Auxiliary verb rule: use the bare infinitive after 'do' or any modal auxiliary verb.
The bare infinitive (without to) is also used after the expressionswould rather and had better, and after need and dare when they are used as auxiliary verbs
After ought, used, be and have, the to-infinitive is used
Certain verbs are followed by an object and the infinitive without to
The bare infinitive form: verb + object + bare infinitive. is used by Verbs of perception such as: see, watch, notice, hear, feel, sense, and other verbs such as let, make, help (in an informal style), and (in few constructions) have and know.
When these verbs are used in the passive, they are followed by the to-infinitive.
Why + infinitive( without to) can be used to introduce questions. The point of the question is usually to suggest that it is stupid or pointless to do something. Why not + infinitive (without to) introduces suggestions and advice.
Rather than is usually followed by the infinitive without to.
Clauses which explain the exact meaning of do can have the infinitive without to.
In English, all the verbs as dictionary entries are shown in the form of the infinitive without to.
In contrast, Hungarian dictionaries use the third form singular, present tense, Arabic -- the third form singular, past tense of the verb as an entry.
Make sentences with these verbs.
use the form, verb + object + bare infinitive