如何划分句子成分?Tell Mary that there's someone ____ for her at door

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如何划分句子成分?
Tell Mary that there's someone ____ for her at door.
有waiting和to wait两个选项?并教我划分句子成分?

\x08这里应该填 waiting
整句话是一个带有宾语从句的祈使句.
由于祈使句,所以主句中省略主语,tell是谓语,Mary是宾语,由于tell可以接双宾语,所以that引导宾语从句.
宾语从句是there be句型,句型倒装,所以someone是主语,is谓语系动词,waiting for her是现在分词短语作表语,at door是介词短语作状语.
现在分词waiting表示正在进行,根据句意,是有人正在\x08门口等她.而to wait不定式表示目的或者将来发生,所以这里应该选择waiting

如何划分句子成分?Tell Mary that there's someone ____ for her at door Tell Mary that there's someone _______for her at the door. Tell Mary that there's someone _____for her at the door. there's someone knocking at the door.等于什么 --who's that at the door?--____ is a postman. There's someone ___ the door. 单选oh,there's someone knocking at the door-must be your neigh 英语 .There's someone at the door.Can you go and see who _____ 一道英语填词题There is someone knocking at the door.Please go and s 1.— There’s someone knocking at the door.Who could _____ be? ----There's someone at the door.Who____ it be Is it the post There’s someone at the door.为什么可以翻译成“有人在敲门”?