have had can could may maight did在句子中的用法

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• 麻烦帮我解释一下这句英文句子中的两个语法问题是高一第一单元的一句话：I can well remember that there was a time when a deep blue sky,the song of the birds,moonlight and flowers could never have kept me soellbound.1.为什么要用“could”这个情态动词的过去式和一般过去时连用,而不是说成could never keep me呢?2.记得keep的用法是keep sb.doing sth.或是keep加上形容词,这里为什么用的是keep加上动词过去式呢?（麻烦不要用宾语啦、宾语补足语啦之类的解释,最好能通俗点,因为听同学给我解释了一遍,几乎听不懂,初中的时候没太学语法,尤其对补足语之类的很是不理解,
• 初三中考英语英语选择题几道求解释1.May i go out and play this afternoon?----no,you（）.Work coms first.A.needn't B.mustn't C.won't D.don't 我选了A但老师给的答案是B,求解这个用法2.what did you say just now?---i （）you if you could follow me.A.said B.asked 这里我不知道有没有听错,老师选了A.我就奇怪有say sb的用法吗?3.will you please let me have a look at the photos taken in the states?---sure.i'll（）them here to school tomorrow.A.bring B.take 带来学校好像不是挺对的,带去才合适点吧,我选了B、求正解4.Alice,why didn't you come here yesterday?
• wish虚拟语气的选择题:I wish I_ longer this morning,but I had to get up and come to class.I wish I_ longer this morning,but I had to get up and come to class.A.have sleptB.sleptC.might have sleptD.could have slept选了B因为想到说这句话的时候还是在today,就用指现在的用法,用did指将来才用4个情态动词+do的,不晓得这里怎么理解为是指将来的,求指教下
• have had can could may maight did在句子中的用法
• The boy died at last.Even if he had been attended without delay,he couldn't have been saved.能给我讲解一下第二句话后半句吗?第二句话是虚拟语气吧?could在虚拟语气中的用法是怎样的啊?
• have had can could may maight did在句子中的用法
• 一个英语语法题,He cannot have got up early this morning,反意疑问句应该是什么?到底是什么啊？有说can he的，有说did he的，谁是老师啊能确定的答案？cannot have done我查了很多地方，在书上没有这样的句子反意疑问句的用法，
• SAT语法问题 1.SAT语法中两个句子通过逗号连接,中间没有连词行吗?如 The delegates has come so far,they did not want to come back without finishing sth.2.冒号在SAT中怎么用?是类似中文里面的解释说明前一句还是有什么别的用法?3.Harry became the first woman to have piloted a plane across the English Channel and did it just nine years after the Wright brother's first powered flight.这句话里面有两个问题要问首先to have pliloted 这个事情是发生在主句动作之前的 应该没错的吧?再者就是SAT 中IT能不能指代一件事情（to have piloted a plane）?还是仅仅只能指代一个名词?我们老师一直都说可以的 但是我看到网上很多人说都是不
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• He wanted to__jump___into the