ever since 是不是要与过去完成时连用

ever since 是不是要与过去完成时连用 ever since 和since 有什么区别Mr li went to America 20 years ago and has bee there ever since.后面为什么是ever since?不是ever since要和现在完成时连用吗?这里怎么会是过去时态啊? ever since since then 与since ever有什么区别? ever since的意思,与since有区别吗 since then 与since ever有什么区别? ever since,ever after 是不是since长与现在完成进行时连用?而when,as,while等长与现在完成时等连用?比如Tom has been playing tennis since he was a boy.这里不能用when吧.since表示一段时间从过去开始持续到现在并且继续持续下 since用法 ,是用在句中还是句末?是不是用在句末时,与ever相连啊,即ever since?求详解since 用法,剧中还是句末 ever since/since 的用法在书上看到的“ever since/since所引导的句子多用过去或现在完成时”能举例说说吗?请举例 句子中出现ever since是不是就一定要用完成时呢、? since后面什么时候跟完成时态,什么时候用过去时态? since只能用在现在(过去)完成时中吗? ever since 和since 的用法和意思有什么区别是不是一样的? 英语句子搞不懂,求教I’m really tired because I have cleaned the house ever since this morning .这个句子应该怎么分 怎么翻译 为什么这里要用完成时 是不是和ever since有关呢? ever since then与哪个同义 ever since,from then on,in the past,from now on 翻译：ever since then ever since then