Since then 的前面可不可以用一般过去时?Sth.______ in my mind since then.空格里应该用burgeoned 还是had burgeoned?选项中的had改成has

Since then 的前面可不可以用一般过去时?Sth.______ in my mind since then.空格里应该用burgeoned 还是had burgeoned?选项中的had改成has you (konw)him since then?用适当的形式you (konw)him since then? ever since 和 since then 的区别,最好还有例子和用在哪种时态. since when ,since then的区别（在线等）he came back from abroad in 1998,since when,he has been doing his business.这一句中为什么用since when 却不能用since then , Since that和 since then是一样的吗?为什么? by then与since then的用法区别? after then和since then的区别RT 41.My brother left school in 2005,and since then he ________ in Beijing.A.lived B.had livedc.has lived为什么选C,不是since前面的句子才用完成时态么?后面应该用过去时态呀,而且前面是过去时态,后面从句的时态也应 have been here 后面可不可以用since Mrs可不可以用在自己的姓前面 from ever since和since then和after that time和from then on的区别? ever since 和since 还有since then 有什么区别?它们分别用在什么时态..在句子的哪个位置?怎么用? Since then he was been doing the work.怎么译?用的是什么时态? .since yesterday前面用现在完成时,还是过去完成时? But then /Before then / Since then/ Until 翻译：ever since then ever since then then与since then的区别?直接引语变成间接引语时,now要变成then,改成since then就不对吗?