哪些动词后面只加do（怎么区分动词后面加不加do）

可接省略to的不定式的动词：let sb. do sth.make sb. do sth.help sb. (to) do sth.see sb. do sth. / doing sth.hear sb. do sth. / doing sth.smell sb. do sth / doing sth.feel sb. do sth / doing sth.notice sb. do sth / doing sth.