句中有already就是现在完成时吗?I already _______ (try one's best) to protect the enviroment.

句中有already就是现在完成时吗? 句中有already就是现在完成时吗?I already _______ (try one's best) to protect the enviroment. I have already had a crash 这句是现在完成时吗? I have already seen it.不是过去的事情吗?怎么会是现在完成时?过去完成时I had already saw it.我现在都有点迷糊了.无论是过去完成时或者现在完成时?反正是完成时就用过去分词?而对于过去式就是用 现在完成时必须有just/already/yet和have吗?它的句型是怎样的?现在完成时的句型是怎样的 主语+?另外I've read this book.这是什么时态?为什么I've后面没有already? already造句用现在完成时 I didn't see the film with my classmates last night because I____ it already.A.had seen B.have seen C.saw D.will see正确答案为A为什么?already 明明就是现在完成时的特征词啊! 关于现在完成时的一些问题.现在完成时变一般疑问句和否定句的结构.现在完成时变一般疑问句,句中的already照抄吗?像这样：I have already seen that film.是不是变成Have you already seen that film?变疑问 为什么句子中有already just 这样的词 就是现在完成时,而不是一般过去时 When I got to his flat,I found _______.B.he had already away D.he had already left为什么选D 现在完成时不是应该用延续性动词吗 I have already had lunch.--为什么在already前要加have,下面不行吗?I already had lunch,--这句是不是语法不对啊,本人语法忘的差不多了.I have already had lunch.--------------------------现在完成时,不用加already也 把以下句子改成现在完成时的肯定句,疑问句和否定句1.I,eat some chicken (already) 2.they,have a party (already) 3.Tom,arrive in china (already) 4.Lily and lucy do their work (already) 在现在完成时的句型中,already能用于一般疑问句吗? 现在完成时中一定要加have/has吗?看到一个填空：They already _____(leave).怎么填? just和already有什么区别吗?在现在完成时里,just和already都表示已经做完.just表示动作刚刚完成,already表示动作早已完成.但在一些填空题里往往很难分清什么时候用哪个词.如:I've ____had breakfast.似 already是什么时态?过去时还是现在完成时? 现在完成时中,怎么区分already 和 just 现在完成时的have什么时候用had?e.g：I had already do sth.这时候怎么用had？