不是"一看二听三让四看半帮助"而是"一感二听三让四看半帮助".

　　一感:feel

　　二听: hear , listen to ,

　　三让: make , have ,let

　　五看: see, watch , look at . observe , notice

　　半帮助: help (指其后的不定式可带可不带to)

　　这些动词后,如跟不定式作宾补,则在主动语态中, 不定式不带to,但在被动语态中要带to,如:

　　He felt something move beside him...

　　他感觉身边有什么东西在动.

　　I heard the girl sing an English song .

　　He often makes his sister cry .

　　His sister is often made to cry .

　　Have you seen a young man pass by

　　Mother watched her son play in the park .

　　Can you help me (to) carry the box ?

　　Let me have a try .

　　Please listen to the man tell the story .