Question

几道英语题 写解析

1.Who knocked at the door so loudly? I don’t know.
I don’ t know ____ _______ at the door so loudly.
2. Do you know ______ else is going to be on duty today？（who, whom）

3. I really don't know________ the bridge will be finished.（how long, how soon）

Answer 1

1 who knocked

2 who
　做从句的主语，所以用who

3 how soon
后面有will,表示将来时，用how soon，问多久
我不知道这桥多久就能修好

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Answer 2

1. who knocked， 这里做know的宾语
2. who， who else is going to be on duty today做前面know的宾语。
3. how soon，我不知道还要多久桥才能建成，所以用how soon，原理同上

how long意为“多久、多长时间”，主要是对一段时间进行提问。
How long do you stay in Beijing every year? 每年你在北京住多久？
How long have they lived here? 他们住在这里有多久了？
—How long were you not at school last year? 去年你多久没上学？
—About two weeks. 约两周。

how soon意为“还要多久”，是对从某个基本时间到将来某动作结束或某动作发生这段时间提问，常用在一般将来时态的句子中，其答语通常是“in + 一段时间”。
—How soon can you finish the work? 还要多久你能完成这项工作？
—In half an hour. 半小时后。

Answer 3

1.I don’ t know who knocked at the door so loudly.宾语从句

2.Do you know who else is going to be on duty today？宾语从句中做主语，whom是宾语
3.I really don't know how soon the bridge will be finished.
how soon还要多久，通常与一般将来时连用
how long 多长时间，通常搭配现在完成时，对for+一段时间提问

Answer 4

1.Who knocked at the door so loudly? I don’t know.
I don’ t know __who__ __knock_____ at the door so loudly.
2. Do you know __whom____ else is going to be on duty today？（who, whom）

3. I really don't know_____how long___ the bridge will be finished.（how long, how soon）

Answer 5

1.who knocked，不知道谁在敲门
2.who，空格前没有介词，用who
3.how soon，提问多长时间