He is having breakfast 用完成时是不是He has had breakfast?

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• He is having breakfast 用完成时是不是He has had breakfast?
• 1.neither of us,none of them在句中作主语时是否都当做单数看待?none of them 是不是可当做复数?2.There ____ no factories,hospitals,schools here fifty years ago.A.was B.were为什么选A?3.—Bill had nothing for breakfast this morning,_______ —______ ,he got up too late.A.had he;Yes B.hadn't he;Yes C.did he;No D.didn't he;No 为什么选A不选C?不是有一个说法是：事实是否定的,就应该回答No吗?根据题意,Bill没吃早饭,就应该是No啊?
• What did he say?I don't know what______选什么A,what he has saidBwhat he had said用哪个更好我认为选B因为要有过去式变为过去完成时但是我们老师说选A.
• he is a student.he had been a student/ he has been a student.中文理解起来有什么不样哪句能看出现在还是不是学生呢?完成时必须后面要有年限才对么?
• 从句中,如何判断用过去完成时还是现在完成时?看这一题：The film __________ for ten minutes when I reached the hall.是用has been on 还是用 had been on 如果是He said that the film ________ for ten minutes when he reached the hall.应该选什么?应不应该改成：when he had reached the hall.练习册上答案是had been on.能不能举一个用 has been on 的例子呢？
• I am worried about my lessons(改为否定句） we get ready for new year（改为现在进行时）用相应的词填空from at in on to nearA car is standing( )a wall( )a tree.He is looking ( )a bird.An owl is sitting( )the tree.She is looking( ) a mouse.A bird flies ( )one tree( )the other tree .A mouse runs ( )one hole( )the other hole.二.1.I go to school in the afternoon.(改为一般将来时）2.I eat two eggs for breakfast（改为一般过去时）三.翻译he has a bad cold.（　　　　　）she will be well soon.（ ）hold on( )what abo
• The old man ,having worked abroad for twenty years,is on his way back to hi这句话还原后应该是:who worked abroad...而不应该是who has worked...因为我认为“这位老人在国外工作二十年是过去的事了,现在已经是在回国的途中了.我们不能因为有了for+一段时间就要用完成时,这是对现在完成时的误用.有下列句子为证：He studied in Beijing University for four years.NOw he works in a company.如果这里用has studied就完全错了.你的看法呢?
• 英语 完成时 过去式完成时与过去式有可能放在一起用吗?比如这样he has been to Japan twice他已经去过日本两次了那我可以这样说吗?he had been to Japan twice since last year他去年已经去过两次日本了..
• people appreciate --with him because he has a good sense of humor.15People appreciate ________ with him because he has a good sense of humor A) to workB) to have workedC) workingD) having worked问题补充：D) having worked 为什么错呢?首先明确 appreciate 这个动词的基本用法是 appreciate doing sth排除 A B然后,明确句子的意思：他很幽默,所以人们很喜欢和他一起工作!描述的是一般事实!用一般现在时 便可!选C现在完成时：用来表示现在之前已发生过或完成的动作或状态,但其结果却和现在有联系,也就是说,动作或状态发生在过去但它的影响现在还存在.I have spent all of my money.(含义是:现在我没有钱花了.) People appreciate
• 关于英语现在完成时方面的.Having turned off the TV set,he began to go over his lessons.=After turning off the TV set,he began to go over his lessons.第一句话为什么用having done?动作是在began之前不是应该用过去完成时吗?是不是由于在句首的原因?可我还是不懂为什么用having turned,明白人讲一下.
• be ready for 意思是?
• be ready for