since从句的用法之一since从句后接过去式还是完成式

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since从句的用法之一since从句后接过去式还是完成式
since从句的用法之一
since从句后接过去式还是完成式

since从句的用法之一since从句后接过去式还是完成式
是这样的 since从句后可以接一般过去式,也可以接现在完成式.
I have learned a lot from her since I have known her.(后面的动词必须是无限的持续性的,不能是瞬间动词).如不能说 It's ten years since his father has died.die 是瞬间动词,改为：It's ten years since his father died.这就是接一般过去式了.总之,接现在完成式时since翻译为“在\自...期间”.

通常后接一般过去式前面使用现在完成时或一般现在时。如：
It has been three years since his grandfather died.或It is three years since his grandfather died.

用一般过去时，前面的主句用现在完成时或一般现在时。
it is five years since we came here.
we have been here since we came here.

since从句后接过去式。
例如： I have been in China since I { came } to Beijing two years ago.

since从句的用法之一since从句后接过去式还是完成式 since when引导定语从句的用法? since 在状语从句中的用法 since从句的时态问题It is/has been +时间段+since从句中since的从句的时态 since引导的从句是什么时态 since的用法 it+is+一段时间+since+从句为什么这里is可以换成has been但不能换成was 在原因状语从句中,now that和since的用法高中英语 since 从句后面用现在完成时? since +从句,since这个词语加从句的话,一般能接什么时态的从句.还有It is +一段时间+ since从句. 请问下面这两个IT的含义和用法?1 It's 3 years since 从句；2 It look as if从句.如果是形式主语,也不对啊,SINCE和AS IF引导的都不是主语从句, It looks as if从句和“It's 3 years since 从句”两句的的IT的含义和用法?请问下面这两个IT的含义和用法?1 It's 3 years since 从句；2 It look as if从句.如果是形式主语,也不对啊,SINCE和AS IF引导的都不是 since引导的原因状语从句需要注意什么 since引导的时间状语从句主句用什么如何理解since引导的时间状语从句 since引导的从句主句一定要用完成时吗 since引导从句的时态可以用哪些 since的从句中一般加什么时态英语 since从句在何时要理解为相反的含义