it was/is 时间 that强调句 时态

it is强调句时态~

楼主说的不错：强调句It is/was……that… 中be的时态只有过去时was和现在时is两种形式.
现在完成时属于现在时,所以用is.
不过值得注意的是：it be和 that（who）在句中不充当任何成分,所以即使用了was,谓语动词依然用过去时,过去完成或过去进行.

it is +时间段+that + 一般过去时 不是强调句

Itis/was……that......强调句用；当需要强调句中的主语、宾语、状语时，我们常用“I；我们分别可以强调主语、宾语、地点状语和时间状语；Itwasthreebooksthatherea；Itwasinthelibrarythather；2.当被强调部分指人时，可用that，也可用wh；ItwasTomwho(that)Imetlas；4.被强调的It is/was……that......强调句用法
当需要强调句中的主语、宾语、状语时，我们常用“It is(was)+被强调部分+that(who)”这种句型，使用此句型时，应注意以下几点。 1.一般情况用It is(was)……that…如： He read three books in the library yesterday.
我们分别可以强调主语、宾语、地点状语和时间状语。如： It was he who(that)read three books in the library yesterday.(强调主语)
It was three books that he read in the library yesterday.(强调宾语)
It was in the library that he read three books yesterday.(强调地点状语)
2.当被强调部分指人时，可用that，也可用who；指物时，只用that,如：
It was Tom who(that)I met last week. It is a new bike that his brother wants to buy. 3.强调状语时，只用that,不用when、where.如： It is at 5 o'clock that the train will arrive.
4.被强调的部分是主语时，注意句子的谓语动词和被强调的主语保持一致。如：
It is he who is late. It is they that were late.
5.一般疑问句的强调句为“Is (was) it +….. that…?”；特殊疑问句为：“特殊疑问词+ is (was) … +that…?”结构。如：
Was it ten years ago that his father died?（他的父亲是十年前去世的吗？）
When is it that you will set off?（你到底什么时候出发？） 6.“not…until…”句型的强调结构为“It is not until…that…”应注意把否定词not转移到until前面。如：I didn't go home until rain stopped.(直到雨停了我才回家)。
强调句为：It was not until rain stopped that I went home. I didn't know the news until yesterday.(直到昨天我才知道那个消息)
强调句为：It was not until yesterday that I knew the news.

It is …… that 谓语动词用一般现在时
It was……that 谓语动词用一般过去式

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宿城区13755342434： it was/is 时间点 when 时态 - ？
赞泼积雪： 看例句 It is three o'clock when will meet. 一般将来 It was yesterday when we met each other. 一般过去

宿城区13755342434： 英语:It is引导的句型知多少 - ？
赞泼积雪： 1.It is / was+被强调的部分+that(who)+剩余的部分.如: It wasn't until he came back that I went to bed.直到他回来我才睡觉.(一定要注意被强调句型谓语动词否定的转移,及形式). It was because he was ill that he didn't come to school today...

宿城区13755342434： 辨析——It is/was +时间+when+...;It will be/was +时间+befro...;It is/has been +时间+since..;强调句式;定语从句.的区分+ - ？
赞泼积雪： It is/was +时间+when+...; 该句型中的 when 引导的是一个时间状语从句,主句中的 it 指时间,表语由具体的时间充当,常译为＂当...的时候,是...＂It was 5 o'clock when he came here.It is + 时间 + before … 这个句型和上面句型中时间都是...

宿城区13755342434： It is +段时间+since+主语+did与It was +段时间+since+主语+had done在意思上的区别 - ？
赞泼积雪： 不是区别的问题 而是 现在时就是这样用、过去式也只能那样用 两个互不干扰的

宿城区13755342434： 怎样区别it++was和it++is的缩写 - ？
赞泼积雪： 根据事情发生的时间,最好是看时间状语is一般是一般现在时,或者是客观的事情,比方说地球绕太阳转一般过去时用was,过去的事情或者状态

宿城区13755342434： It is/was +段时间 +连词(since/before)+一般现在时,一般过去 - ？
赞泼积雪： It is +一段时间+since...意思是“自......发生以来已经一段时间了”.如:it is three years since he died.(自)他去世以来已经三年了.It is +一段时间+before...意思是“过了一段时间...才发生” 如:It is 3 years before they accept the fact.过了三年他们才接受这个事实. 这是固定句型.自从发生到现在 当然是个一般现在时的状态了,叙述个事实而已.

宿城区13755342434： what time it was和what time it is有什么区别 - ？
赞泼积雪： what time it was 是问过去的时间,而what time is it是问现在几点钟了.

宿城区13755342434： It is/was time that 的用法 - ？
赞泼积雪： 1.强调结构:It is/was ... that ....例句:It was at 10 o'clock that I heard the news.2.表示时间例如:It was 10 o'clock when I heard the news.3.表示“现在离(某事发生)已经有(一段时间)了.”

宿城区13755342434： 英语中的强调句型(初中的)It is +时间 + since +一般过去式的句子It was +时间 + since +一般过去式的句子It hasbeen +时间 + since +一般过去式的句子这三... - ？
赞泼积雪：[答案] 这三个不是强调句型,只是表示时间.如:It is three years since I came to London.指我来London 三年了,也可用It has been 说这句话.It was.since 同理,只是指过去. 强调句型应该是 It is/was .that.,强调人时,that 可换成 who . 如:It is my mother who/...

宿城区13755342434： 有没有it was +时间 since ... - ？
赞泼积雪： 有那样的句型.比如: It was three years since he had left.自从他离开,已经三年了.since用过去完成时,主句用一般过去时,这样完全可以啊.这句话是在述说过去的事情,用it was一点没错啊!