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此处为何使用sincewhichyear?Lilywasadmittedbyafamousunversityin1990,sincewhichyearwehaveneverheartfromhim.1、直接改成sincewhich用which自己代1990行么?2、改sincewhen成么?3、为何不能使用afterwhichyear?
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此处为何使用since which year?
Lily was admitted by a famous unversity in 1990,since which year we have never heart from him.1、直接改成since which 用which自己代1990行么?2、改since when 成么?3、为何不能使用after which year?似乎要从时态上判断介词用since,但不知如何判断,
Lily was admitted by a famous unversity in 1990,since which year we have never heart from him.1、直接改成since which 用which自己代1990行么?2、改since when 成么?3、为何不能使用after which year?似乎要从时态上判断介词用since,但不知如何判断,
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Lily was admitted by a famous unversity in 1990,since which year we have never heart from him.
1、直接改成since which 用which自己代1990行么?答：不行.因为which在此【做定语】修饰year.
2、改since when 成么?答：不成.因为since是介词,后面不能接副词或连接副词.
3、为何不能使用after which year?答：因为since引导的时间是【从过去延续到现在】,刚好与【现在完成时have never heart from him相吻合】.
1、直接改成since which 用which自己代1990行么?答：不行.因为which在此【做定语】修饰year.
2、改since when 成么?答：不成.因为since是介词,后面不能接副词或连接副词.
3、为何不能使用after which year?答：因为since引导的时间是【从过去延续到现在】,刚好与【现在完成时have never heart from him相吻合】.
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