however放在句中用法He has not arrived.He may,however,come later.however在句中的话,这里是放在may后面.那放he后面可不可以?语感觉得应该可以!所以有没有什么官方的知识点讲however在句中的用法?是不是放

however放在句中用法He has not arrived.He may,however,come later.however在句中的话,这里是放在may后面.那放he后面可不可以?语感觉得应该可以!所以有没有什么官方的知识点讲however在句中的用法?是不是放 “It is not,however,always a smooth and safe one.”中however是什么用法,为什么放在句子中间,放在句首可以吗?为什么与中文的说法不同? however的用法,为什么老是放在句中,用两个逗号与前后句隔开,例句如下Appendicitis is potentially fatal; consequently,patients with symptoms strongly suggesting appendicitis almost always have their appendix removed.The appropria He has not arrived.He may,however,come later这个句子怎么理解,he may 在句子中做什么成分? However是否前面必须是句号,后面必须接逗号?however如果放在句中，一般都有什么情况啊？（似乎很少见） he has seen that film twice already.这句的already能放在has后面吗?为什么 have/has to 的否定在句中的用法NOT应该放在什么位置请举例 She has just boiled an egg.She has never been toShe has just boiled an egg.She has never been to China.He has already painted that bookcase.在这3个现在完成时的句子中,副词just ,never already,为什么放在句中这样的位置,放其他 用 instead 放在 句中的用法 however可以放在句尾吗如题 whenever,however whatever这些词怎么用在句中? eg：He won't go,I will go instead.句中的instead放在最后是什么用法? He has refused to help them这个简单句them为什么要放在to help的后面, however用法 mr.green has little time today,反意疑问句do he?has he?用哪个怎么分have的用法求大全是does。是不是就是因为句中has是实义动词所以就用does啊？ He himself has done it lots of times.这句话中himself做什么成分?为什么放在这个位置 he has but a little money 句中,but作什么成分?怎么理解but.but的用法,举几个类似的例子看看. He has already gone to England改成疑问句Has he gone to England yet?为什么将already 改为yet且yet放在句尾?句中的gone变疑问句时为什么不变成go呢？