请帮忙分析语法I have been trying to think up a gool slogan,and since you've been such a big inspiration to the people around you.since之后为什么用过去完成时?

请帮忙分析这句英语的语法If I hadn't have missed my trainI wouldn't have been here意思是,如果我没错过那趟火车,我就不会出现在这里了. they would not have been prosecuted if they had not lied to police.请帮忙分析词句的语法结构 请帮忙分析语法I have been trying to think up a gool slogan,and since you've been such a big inspiration to the people around you.since之后为什么用过去完成时? It is the third time that i have been in Beijing.帮忙分析下这句话的语法结构和时态,为什么用have been 语法知识,语法达人帮忙Listen Donna,I don't care if you (miss) missed the bus this morning.You (be)have been late to work too many times.You are fired!have been 怎么用? 语法结构问题 I have been blessed to have in my life这句话什么结构?不好理解,请尽量详细分析之, i must have been dreaming 的语法结构怎么分析呢? 请帮忙看下这句英语的语法是否有错误I tidied up this listing of samples which have so far been send 请分析两句话的语法?I have been there twice.I have learned English for three years.第一句的twice是什么用法?为什么第二句用吧FOR?I have done that for three times这句话对吗? it'been worth it中been的是什么用法?请帮忙分析一下这句话的语法 I have been worked ten years as a service engineer since I graduated from university.这话有错吗?请高手帮忙分析,谢谢 请帮忙分析下语法Had he not agreed to attend ,some say,the convention would not have been held.had 放在he 前面是什么语法现象,用 if he had not .,是不是一样? 语法题目请分析为什么不选A谢谢“Have u seen David recently?No.I guess he ( )away on vacation.A.must has beenB.must beC.might have been D.may has been I meet my friends and we always have a great time talking to each other.请帮忙分析下句子的语法 I think the best chance for us to be great here taday is to have you paly.请帮忙分析下这句话的语法 i have never been to a debate so far这句话是什么意思, 高手帮忙分析下 I have been dowm that road.句子中的down是什么词性啊现在完成时的主动时态构成不是have/had+Ved吗?这里的been是什么意思呢?down这个词又是怎么回事呢?请大家帮忙分析一下这句话,谢谢! Write a T if the sentence is true.请帮忙分析下这个句子的语法