To- & Bare Infinitives

You've just typed Please let me to know if that time works into an email — and something's nagging at you, maybe the little green underline, maybe just your own ear. Or you're proofing a line on your CV [US: résumé] that reads I was made to train the whole team, and you're wondering whether that to is right, wrong, or merely fussy. Delete it, retype it, delete it again — and eventually you send it and hope for the best.

Here's the thing. That "do I need to or not?" flicker is one of the most common little hesitations I see in grown-up writing — in work emails, cover letters, reports, the lot. And nobody's born knowing the answer; it's not a sign you missed something at school. English has two ways of giving the plain form of a verb a job in a sentence — with to, and without — and mixing them up is exactly the kind of small slip that makes otherwise confident writing look a fraction less sure of itself.

The good news is the system's more regular than it feels. There's the to-infinitive — to know, to finish, to send — and the bare infinitive — know, finish, send. Each has its own territory. Once you can see where the borders run, a big chunk of your everyday writing — emails, Slack messages, that note to the landlord — quietly settles down.

Before you read on, here's where we're heading. By the end of this article, you'll be able to: - Recognise to-infinitives and bare infinitives and drop each into its usual job. - Use to-infinitives for purpose, after everyday verbs like want and decide, and as subjects when formality suits. - Use bare infinitives after modals and after make, let and help. - Sidestep the mix-ups that cost you polish — and know what this piece deliberately leaves to its neighbours.

Beginner (Foundation)

Let's keep the starting point practical. An infinitive is the plain form of a verb — the one you'd look up: send, meet, apply, be. English dresses it two ways for work in a sentence.

Add to and you've got the to-infinitive: to send, to meet, to apply. You use it constantly — I need to send that attachment, She hopes to meet the client on Friday. The to flags the verb idea without tying it to a time yet.

Leave to off and you've got the bare infinitive: send, meet, apply. This is the form that sits after modals — I can send it tonight, You should write a quick reply, We must leave on time. No to anywhere near it.

Here's a pair from an ordinary Friday — same action, different packaging:

• I want to leave by five. — to-infinitive, after want
• I might leave by five if the meeting wraps up. — bare, after might

The to-infinitive has three starter jobs worth fixing in your head now. It follows verbs like want, need, hope, plan — We need to approve the budget. It shows purpose, answering "why?" — I called to confirm the booking. And, in more formal writing, it can be the subject of a sentence — To approve late changes is risky — though in a hurry you'd more likely say It's risky to approve late changes.

The bare infinitive's first home is after any of the core modals: can, could, will, would, shall, should, may, might, must. Get that one reflex solid and you'll have headed off a large share of drafting slips before they happen. And two ordinary verbs — make and let — join the modals in taking a bare infinitive after their object: My manager made me redo the report, Let me explain**.

Common Mistake: You must to finish this by Monday. Modals never take to: You must finish this by Monday.

Pro-Tip: A lot of polished writing is built on to-infinitives — I'm pleased to confirm, I'd be happy **to help, I'm sorry to hear that. Get comfortable with that pattern and half your everyday sentences tidy themselves up.

Quick recap: - To-infinitive = to + verb; bare = verb alone. - To-infinitives follow want, need, hope, plan and state purpose. - Bare infinitives follow modals — can, will, should, must. - Make and let take a bare infinitive: made me redo, let me explain.

Intermediate (Development)

Let's map the patterns you'll actually meet in a working day — where you're firing off emails and short reports far more often than essays.

The to-infinitive does most of its work finishing off another verb — the complement job. A whole crowd of professional verbs pull one along: want, need, hope, decide, plan, expect, agree, refuse, offer, promise, manage, fail, intend.

• We've decided to postpone the review.
• She offered to cover the morning shift.
• They refused to sign until the clause was rewritten.
• I managed to fix the issue before the demo.

It finishes off adjectives the same way — happy to help, difficult to explain, keen to start, essential to follow — and it carries purpose cleanly: I'm writing to request a reference, He stayed late to close the ticket. When the reason is an intended action, a to-infinitive beats a long because I wanted to… every time.

And when formality suits — a policy note, a report — it can stand as the subject: To ignore the small print would be unwise. Informally you'd flip it round: It would be unwise to ignore the small print. Both are correct; pick the one that fits the channel.

The bare infinitive, meanwhile, still lives mainly after the modals: You must submit by Friday, We might need a second quote, Could you forward the pack? Putting a to after any of them — must to submit — is always wrong, full stop.

Then there's the trio — make, let and often help — taking a bare infinitive after their object:

• The new schedule made everyone start earlier. — not made everyone to start
• Please let me know your availability. — not let me to know
• Can you help me draft a short reply? — or help me to draft; both are fine

Let's be honest — let me to know is one of the most common traps going, and it turns up in the writing of people who are otherwise very careful. The rule's simple: the moment there's an object after let or make, the to goes. Help is softer — help me draft and help me to draft are both perfectly good, and the bare version's the more common in British English — but make and let don't bend.

Common Mistake: They made us to redo the filing. / Please let me to know. Correct: made us redo; let me **know.

Pro-Tip: Editing a rushed email? Search the draft for "let me to" and "made … to" — those two quick checks catch a surprising share of bare-infinitive misses before they reach the recipient.

Quick recap: - To-infinitives complete verbs (decided to postpone) and adjectives (happy to help), and carry purpose. - They can be subjects when formality suits (To ignore the small print would be unwise). - Bare infinitives follow every core modal — no to. - Make/let + object take bare; help takes either. Let me know, never let me to know.

Advanced (Mastery)

Here it's about control — matching the construction to the channel, and knowing the exceptions that trip careful writers once a sentence stretches out.

Start with the trap that catches the most people, because it hides in plain sight. Make and let take a bare infinitive — but their near-synonyms don't. Force, allow, order, require, get all take a to-infinitive: forced me to leave, allowed us **to leave, required staff to complete** the training. So two families sit side by side:

• make / let → bare: made us revise, let us leave
• force / allow / order / require → to: forced us to revise, allowed us to leave

Only make and let demand the bare form. Reach for any of the others and the to comes straight back.

Next, the for + someone + to-infinitive pattern — the one you need whenever you have to name who does the action:

• It's essential for new hires to read the handbook.
• It's unusual for him to be late.
• This is a chance for us to improve the service.

You need both halves. It's essential for read the handbook (no person) and It's essential you to read the handbook (no for) are both broken; the full shape is for you to read.

And a word on the split infinitive, because it's a favourite weapon of the sort of person who enjoys correcting other people — to boldly go, with the adverb wedged between to and the verb. Let me set your mind at rest: it isn't a mistake, and it never was. The idea that you mustn't split an infinitive was imported from Latin, where the infinitive is a single word you physically can't split, and it got bolted onto English by people who thought Latin was the tidier language. Write to fully understand the risk if it reads better than the alternatives — it usually does. In a very formal document you might move the adverb aside to soothe a nervous reader, but you're making a style choice, not fixing an error.

Finally, the borders — because this article owns its patch and links out for the rest. You'll notice some verbs let you pick between a to-infinitive and an -ing form — I started to work / I started working, I like to cook / I like cooking — and sometimes the choice even shifts the meaning. That whole competition is its own subject, and it lives in F2; don't assume to do and doing are interchangeable, but don't try to settle it here. The bigger patterns that make, let and have can build — the causatives, have the report written, get the team to sign off — belong with F5. This piece stops at the basic fact: made us revise, let us leave.

Common Mistake: Treating force, allow and require like make and let. It's let us leave (bare) but allowed us to leave (to). Learn the two families, not one shaky rule.

Pro-Tip: Unsure after an object? Try a quick rewrite in your head: X made Y [verb]. If it sounds natural without to, the verb's in the bare club (make, let). If it wants to, park the to — you're dealing with force, allow and friends.

Quick recap: - make/let → bare; force/allow/order/require/get → to. - for + someone + to-infinitive names the doer: for you to sign. - Split infinitives are fine — a borrowed Latin "rule", not an English one. - Gerund-vs-infinitive (F2) and full causatives (F5) sit outside this article; use to after reported-command verbs (E2), e.g. She asked us to wait.

UK vs US Note

The grammar's shared across both varieties — a to-infinitive works the same way in London and Los Angeles, and make/let/help don't shift. The only differences are cosmetic spellings in nearby words: organise [US: organize], minimise [US: minimize], colour [US: color], CV [US: résumé]. None of that touches the choice between to-infinitive and bare infinitive.

Key Takeaways

• An infinitive is the plain form of a verb; it appears as a to-infinitive (to send) or a bare infinitive (send).
• Use to-infinitives after verbs like want, decide, hope, manage, after adjectives (happy to help), for purpose, and as subjects.
• Use bare infinitives after modals (can send, must submit) and after make and let (made us revise, let me know); help takes either.
• Don't add to after can, must, should, make or let.
• Force, allow, order, require, get all take to — keep them out of the make/let club.

Check Your Understanding

1. Fix the line: Please let me to know whether the invoice arrived.
2. Choose: We must (to finalise / finalise) the agenda before Tuesday.
3. Add purpose with a to-infinitive: She emailed HR. She asked about flexible hours.
4. Correct or incorrect at this level? The manager made the team to stay late.
5. Fill the gaps: It's essential ___ every new hire ___ read the safety notice.

Answer key 1. Please let me know whether the invoice arrived. 2. finalise — bare after the modal must. 3. She emailed HR to ask about flexible hours. 4. Incorrect → made the team stay late (no to after make). 5. It's essential for every new hire to read the safety notice.

Internal Links

• F2 — Gerunds vs Infinitives (verb patterns): for the to do vs doing question.
• F5 — Causatives (make, let, have, get): for the fuller patterns, like have something done and get someone to do it.
• B4 — Modal Verbs: a deeper look at can, could, should, must and the rest.
• E2 — Reported Commands and Requests: using infinitives to report orders (She asked us to wait).