作业帮应该是It's necessary for keep fit.为什么正确答案确是It's necessary to keep fit.
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应该是It's necessary for keep fit.为什么正确答案确是It's necessary to keep fit.
应该是It's necessary for keep fit.为什么正确答案确是It's necessary to keep fit.
应该是It's necessary for keep fit.为什么正确答案确是It's necessary to keep fit.
应该是It's necessary to keep fit 啊.
因为to后面跟动词原形,而for后面只能跟现在分词,而且习惯用法也是用necessary to do sth.而不是necessary for do sth.
to就是引导动词不定式.
这是动词不定式
结构是It's necessary for sb.to do sth.
改成：(T)to keep fit is necessary.
能明白了吗？
I find it necessary to know more about other countriesit necessary 不应该是it's necessary.
应该是It's necessary for keep fit.为什么正确答案确是It's necessary to keep fit.
it's necessary是什么意思
It's necessary to learn English well.
翻译it's not necessary to hurry
It's necessary这是什么形式?
It's not necessary _________________(相同的)
it's necessary for you to give up smoking(保持句子原意) it's necessary ____you____smoke
realise it necessary还是realise It's necessary可以邦我讲讲么
It's necessary（ ）protect wild animalsIt's necessary（ ）protect wild animals.
i think it's necessary to be friendly to others 的necessary用什么形式
It‘s necessary for us___(learn)English well说明原因
it's not necessary to be the same翻译
翻译：It's not necessary to be the same.
It's not necessary to the same.这句改错
it's not necessary to be the same
英语翻译It's necessary for us to have a meeting.
it's necessary for us to have healthy eating habits