English Infinitives: When to Use To

The base form is the form listed in a dictionary, such as go, send, or finish. A to-infinitive adds to before that form. A bare infinitive uses the base form without to. To choose between them, check the full verb pattern: some verbs take an object before the infinitive, and other words can come between the verbs.

Many standard verbs that express plans, decisions, agreements, or desires require a to-infinitive. When you speak about things you want, arrange, or intend to do, treat the verb and to as a natural pair. Common verbs in this group include decide, expect, hope, need, plan, promise, refuse, and want. Notice that the first verb changes for tense, while the to-infinitive never changes its form.

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Modal verbs express concepts like ability, necessity, advice, and possibility. The most frequent modals in daily English are can, could, may, might, must, should, will, and would. A modal verb is always followed directly by the base verb without to. Adding to after a modal is a frequent error for learners who memorize pairs like want to and then accidentally apply to everywhere.

When you want someone else to perform an action, certain verbs place an object between the main verb and the to-infinitive. Common verbs using this pattern are ask, remind, tell, advise, expect, and invite. The object can be a person's name or an object pronoun such as me, him, her, or us. The pattern is always verb plus object plus to plus base verb.

Unlike verbs such as tell or ask, the verbs make and let do not use to when followed by an object. Make means to require or force someone to act, while let means to give permission. In both cases, the pattern is verb plus object plus base verb without to. Mixing up allow with let causes mistakes: allow takes to, but let never does.

You can use a to-infinitive to answer the question why an action occurred. This structure functions as a shorter way of saying in order to. Learners often mistakenly use for plus a base verb or for plus an -ing verb to explain personal motivation. In standard English, use to plus the base verb when stating what you intended to accomplish by acting.

A common way to make an infinitive negative is to place not before to. Placing not after to is also possible. Do not put a finite form such as do not or did not inside the infinitive. Notice the difference between deciding not to go and not deciding to go: the first expresses a decision against going, while the second says that no decision to go was made.

In rapid natural speech, native speakers rarely pronounce the word to with a long vowel sound. Instead of saying /tuː/, they reduce the vowel to a quick schwa sound, sounding like /tə/. When to follows a consonant, it blends smoothly into the next syllable. Recognizing this reduction prevents you from missing the tiny word to when listening to native speakers in fast workplace discussions.