We must ( )to school at seven thirty.A goB goingC are going2.Lily,( )the window.A don't closeB doesn't closeC isn't closing请说明理由

分类: 作业答案 • 2021-12-20 07:10:01

问题描述：

We must ( )to school at seven thirty.
A go
B going
C are going
2.Lily,( )the window.
A don't close
B doesn't close
C isn't closing
请说明理由

答

go
因为go to school是一个词组，上学去的意思，然后must是情态动词，后面必须跟动词原形，而且是一般现在时，也要用动词原形

答

都选A
MUST情态动词后+动词原形
第2题是祈使句,也就是叫别人做什么,肯定用动原,否定用DON'T+动原

答

1,A .must 是情态动词后面接动词原形
2,A .","后面的句子其实是个祈使句.肯定句用DO(可以省略,不省略表示强调),否定用 DO NOT