如何区分强调句和状语从句

Question

1如题
2 It was evening(B)we reached the town
A that B before C since D until
3 It was with great joy (D)he received the letter
A because B which C since Dthat
3.It is imagination (C)makes the world more beautiful
A where B what C that D when
4.It was in New York ((A)Mary first met him
A that B which Chow D when

解释下为什么，谢谢~

Answer 1

举个例子，如2号题，看后面句子，主谓宾都有，所以句子 肯定是缺状语，但是不能用that ,如果是at the evening 就可以用that ,因为at the evening 可以做状语，但是evening 不可以做状语，总结，后面从句缺状语的如果在be 动词之后是介词，那么就是强调句，否则填适当的连词。 2和3就是这个原因。。3中有介词with.4中有in .

Answer 2

2It was evening (when we reached the little town of Winchester).
括号内是时间状语从句。It was evening 是主句。

3去掉it was和that以后句子依旧完整无误。所以用that

3去掉it was和that以后句子依旧完整无误。所以用that

4去掉it was和that以后句子依旧完整无误。所以用that

区别强调句和状语从句最大的关键是看去掉it was\is和that后句子是否依旧完整。本回答被网友采纳