钳工常用划线工具:请大家帮我解决一些问题~~~

这个，首先要先明白，动词之后一般可以以下几种形式：
to do表示一种将来会发生的事或是一种目的，比如说went to see the film就是表示的是一种目的;
did/done表示一种已经完成的或是被动的状态,比如The manager promised to keep me informed of how our business was going on. keep me informed指的就是我被告知
doing表示的是一种伴随或是一种正在进行的状态。比如，she drove the car, listening to the music.她一边开车，一边听音乐。
一般情态动词can, may, should, shall等后面一般直接加动词原型。
就一般情况下来说，动词过去式的句式规则同它的原型相同。
下面的这些词后加的是do
A.feel
hear
liseten to
look at
notice
see
watch
observe(这些词若是加do表示的是一种持续性的行为，若为doing则表示的是一种瞬间的短暂性行为)
B. let
make
help
know
e.g We felt the house shake.
I've never known him sing so beautifully before .
这些词后面加的是to do
agree
appear
ask
decide
demand
expect
help
hope
fail
learn
manage
offer
plan
prepare
seem
want
wish
tell
teach
下面这些词用doing
A.admit
dislike
enjoy
excuse
finish
imagine
mind
catch
B.look forward to
be used to
get down to
keep on
give up
feel like
prevent from
stop from
be busy
下面有一些固定搭配，建议不妨记一下：
why not do
had better do
would rather do than do
prefer to do rather than do
prefer doing to doing
I can't but do
I can't help but do
I can't choose but do
it's no use doing
it's useless doing
it's no good doing
there's no use doing
there's no good doing
there's no need to do
其实这些词在上课的时候，老师基本上是会提到，有一些比较经常用的词，像是have, with之类的，一般不会有很固定的搭配，一般是符合最上面所讲的规则，视情况而定。要是楼主仍然还觉得有所欠缺，建议楼主不妨买一本名为《英语语法实践指南》的书，那上面讲得很全，而且基本初中高中都适用。

情态动词＋动词原形（should,can,may,must,need)
祈使句＋动词原形
助词＋动词原形
had+better+(not)+do+sth
let+sb+do+sth
why don't you/why not+do
in order to(词组）＋动词原形
将来时态中用动词原形
have to （词组）＋动词原形
let+sb+do+sth
help+sb+do+sth
see/watch/find/hear+sb+do+sth
be able to(词组）＋动词原形
too……to(词组）＋动词原形

went是go的过去式,两动词之间加to,所以，是went to visit,但只有go遇到副词：here there home ,才省略to

情态动词后跟动词原形
祈使句中用动词原形
TO后面加动词原形
had to do sth. want to do sth. need to do sth.
start to do sth.

情态动词＋动词原形（should,can,may,must,need)
祈使句＋动词原形
助词＋动词原形
had+better+(not)+do+sth
let+sb+do+sth
why don't you/why not+do
in order to(词组）＋动词原形
将来时态中用动词原形
have to （词组）＋动词原形
let+sb+do+sth
help+sb+do+sth
see/watch/find/hear+sb+do+sth
be able to(词组）＋动词原形
too……to(词组）＋动词原形

went是go的过去式,两动词之间加to,所以，是went to visit,但只有go遇到副词：here there home ,才省略to