Question

请问这些句型，后面都应该是什么时态？谢谢

①it is 被强调词 that ？
②it is/was said/believed/supposed that ？
③it is obvious that ？
④it seems/seemed that ？
⑤so adj/adv that ？
⑥it seems to be （接什么成分）
⑦there used to be （同上）
是不是根据情况随便选用适合的时态？？

Answer 1

①强调句型的时态就是跟原句的时态一样
例如：I went shopping with Ann this afternoon.
It is Ann who went shopping with me this afternoon.
It is this afternoon that I went shopping with Ann.
②it is said that后面接的时态要看句子表达的意思，很容易懂的，这个句型的考点不是时态，懂得it is said意思是据说，it is supposed that意思是据推测就行
例如：
It was said that he won a prize last year.据说他去年得了奖。
It is said that she will get marry with John next Monday.据说她下周一和约翰结婚。
③it is obvious that
这就是个it is +adj+that从句，时态也很好确定，一般接一般现在时和一般过去时，这个句型的考点也不是时态，一般考试的时候看到此类句型就要考虑that从句后面是否要接虚拟语气
④it seems/seemed that 这个时态也很好确定，跟上面一样
⑤so adj/adv that 这个句型主要是倒装的问题
⑥it seems to be 后面接表语成分，名词，形容词，动名词，一般接形容词可以省略to be，接名词不能省略，接表语形容词如alone，afraid,awake的时候也不能省略
例如：
She seems（ to be） sad.她看起来很难过。
He seem to e asleep.他似乎睡着了。
It seem to be a great idea.这是个好主意。
⑦there used to be是there be 句型和used to do 句型的结合，意思是过去有...，后面接名词
例如：There used to be a beautiful park.那里曾经有一个很漂亮的花园。
There used to be a computer there.以前那里放有一台电脑
There used to be a grocery store on the corner.以前在这个街角有家杂货店。

Answer 2

it做形式主语的强调句，that后根据具体情况选时态。