make和let后面通常接不带to的不定式。如：
They can’t make you work late.他们不能让你工作到很晚。
She made him do the exercise again.她让他再做一次练习。
She lets the students sing in class.她让学生们在教室里唱歌。
His parents let him paint his room black.他父母让把他把房间刷成白色。
Have也可以用这种形式：
Please have your secretary call me as soon as possible.
注意：在被动式里，make接不定式的时候，需要加to。如：
They are made to do exercise again.他们被要求再作一次练习。
其他不定式不带to的动词
情态动词（can、will、would等等）接不定式不带to：
I can see him clearly.
They will leave early tomorrow.
If I were you, I would talk to her.
see/hear/watch sb接不定式不带to:
She saw the girl steal the money. (She saw all the action of stealing.)
I heard him tell her about the party.(I heard all about the party.)
I watched them do the exercise. (I watched them complete the exercise.)
要注意的是：如果你在这些动词后面接的是动名词形式，就表示你只看到、听到那些动作的一部分。如：
She saw him talking to the teacher.(她看到他在和老师讲话，但是没有从头到尾地看这场对话)