be to do 和 be doing 做主语

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/09 19:26:41

be to do 和 be doing 做主语
the first thing when you go to school is( )the teacher.
a.greeting b.to greet c.greet d.greeted
选哪一个?

The first thing when you go to school is( b )the teacher.
a.greeting b.to greet c.greet d.greeted
【解析】动名词和动词不定式作主语的差别是：前者表抽象概念,即一件事,而后者表达一次具体动作.
序数词往往跟动词不定式连用.

be to do 和 be doing 做主语用 be doing 和be doing to do 造句三个 be used to do 和doing区别不定式做主语It+be+形容词+for sb.to do sth 和 It+be+形容词+of sb.to do sth be careful doing和be careful to do的区别? be easy to do和 be easy doing 的区别 be going to do 和be doing用法的区别? 关于be to do 和 will be doing be doing和be going to do的区别 be afraid to do 和 be afraid doing 的区别? be afraid of doing 和 be afraid to do 区别 be to do和be doing的区别