bi de to gelmeyen infinitive ler var onlara bakalım:

misal let

don't let her upset you.
let your body relax
let us do something about it.
let's= let us bu arada.

make:

he made me repeat the exercise.
i like him because he makes me laugh.

hear var:

i hear her talking shit. (bi an duymuş)
i heard her talk shit. (oturup dinlemiş)

see:

i saw him fucking you. (bi an görmüş)
i saw him fuck you. (oturup izlemiş)

help

she helped him choose some new clothes.

modal verb lerden sonra mesela:

you must leave now.

ya da would rather kalıbından sonra had better kalıbından sonra:

you'd better come in now.
i'd rather not just stay with him all the time.

bunlar da hep infinitive ama to olmayan. "infinitives without to" diye geçer.

bi de ufak bi detay: object pronoun ve pronoun sonrasında genelde "to verb" olur.

he asked me to help him.
i told jack to do this.

istisnası ne işte: i see him cheating. i see him cheat. gibisinden. yukarı bakarsın.