let用法do与todo区别

1. Let的用法 1)当let后只有一个单音节动词,变被动语态时,可用不带to 的不定式. They let the strange go.---> The strange was let go. 2) 若let 后宾补较长时,let 通常不

是let do,没有let to do

let sb do 它的被动形式是 sb was let to do

let后面接let sb to do sth,make也是同样的用法,翻译为使得某人做某事

let后面只可以跟sb do sth.不可以跟sb doing sth.

let是情态动词,也是使役动词.后加省略to的不定式,即直接加do,变为被动时需要还原to,即sb was let to do .由此类用法的还有feel,hear,listen to,have,make,look at,notice,see,watch,observe

let somebody do something 是一固定搭配的,let是一祈动词其后面接动词得省略to

一般情况需要.使役动词被动情况需加上to.例如: they let him talk. he was let to talk. they made him run. he was made to run. 但有一种情况例外,就是let go. he has been let go.他被放了. let go,是一个非常固定的短语,指放了某人.我们经常在美国的动作片里听到这个词.因为用得实在太多了,所以被动的时候人们还是习惯用let go. 语法上,let to go也是可以的.

使役动词let/make/have/get后接省去to的不定式 也就是直接加do其他动词动词不定式作宾语/补语的话不能省略to 必须是to do

go doing 表示已经做的事情,现在继续作 go to do 表示去做另一件事