1：how can he get good grades____he won't study?我填AS,想用作原因,而答案给的WHEN,我猜想可能是用做既然表条件,我觉得这样的话答案不如我的准确,还是有别的原因?2：Three years had passed _____ i knew iti:since;answer:before 3:Nancy enjoyed herself so much ____ she visited her friends in Syeney last year用WHEN 还是 WHERE?有时整个从句修饰主句既可以用作表示时间状又可以表地点状,连词怎么样用?4：MY ENGLISHI teacher 'humar was ____ make every student burst into laughterans:such as to；SUCH AS还能连用吗?我只知道结果状有SO THAT,SO.THAT,SUCH.THAT,请问SUCH AS 是什么用法?5：经

1：how can he get good grades____he won't study?
我填AS,想用作原因,而答案给的WHEN,我猜想可能是用做既然表条件,我觉得这样的话答案不如我的准确,还是有别的原因?
2：Three years had passed _____ i knew it
i:since;answer:before
3:Nancy enjoyed herself so much ____ she visited her friends in Syeney last year
用WHEN 还是 WHERE?有时整个从句修饰主句既可以用作表示时间状又可以表地点状,连词怎么样用?
4：MY ENGLISHI teacher 'humar was ____ make every student burst into laughter
ans:such as to；SUCH AS还能连用吗?我只知道结果状有SO THAT,SO.THAT,SUCH.THAT,请问SUCH AS 是什么用法?
5：经常能够看到ON CONDITION THAT引导条件壮没有使用主将从现,书里面说“大多数”使用主将从现,我想问：用什么界定情况?根据句意?还是某些连词用,某些连词不用?我发现大多数没有主将从县的,从句大多数谓语都是CAN,有这种规律吗?