助动词一般就是do,does
情态动词：
①只做情态动词：must,can(could),may(might),ought
to
②可做情态动词又可做实义动词：need,dare
③可做情态动词又可做助动词：shall(should),will(would)
助动词:do,其变形有does,
did
情态动词:may,
might,
can,
must,need等
be动词
am
,is
are
,was,were
助动词
do,does,did
情态动词
can,may,must,might,should,need,could,ought
to,would....
额~~~~
助动词
do
情态动词：can
could
should
may
might
```````and
so
on
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