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To save water is (to) save our lives

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/16 06:19:17
To save water is (to) save our lives
To save water is ( ) our lives.
A.to save B.save
选什么?为什么?请说清理由!
is 怎么会跟 to do
A 主语和表语通常要一致,要用动词不定式都用不定时,要用动名词都用动名词,例如
To see is to believe
Seeing is believing眼见为实
再问: is 怎么会跟 to do
再答: is 后跟to do 即动词不定式做表语,表示一次性动作。跟动名词表经常性动作 My job is teaching English but today my job is to water the flowers.