Shall / can I 有什么区别?___ I put the vase near the window or behind the door?这里是shall,但是用can可以?似乎意思没有区别.

Shall / can I 有什么区别?___ I put the vase near the window or behind the door?这里是shall,但是用can可以?似乎意思没有区别. Shall I buy sth for you?中的shall这个shall到底是助动词,还是情态动词呢?如果是情态动词,跟can有什么区别呢?shall当情态动词讲的时候 和 can 的区别是语气强弱的区别吗? I shall be attending the meeting.与I shall attend the meeting.到底有什么本质的区别? I shall be attending the meeting.与I shall attend the meeting.到底有什么本质的区别? i shall be most happy to help you 和 i shall be happiest to help you 有什么区别? 提出建议有Can we,shall we.他们有什么区别 do与can、will、would、shall、may、must助动词用法一样吗 有什么区别 What shall I do?和 What should I do?意思上有什么区别? what should i do 和what shall i do 有什么区别?如题 what should i do?和what shall i do?有什么区别 should和shall用法有什么区别 shall和will有什么区别啊? shall和will有什么区别 I don’t think I can和I think I can’t有什么区别? will would ; shall should ; can could ; must need ; may might以上每组有什么区别,分别应用在什么时候? may i 和can i 的用法区别是什么?may i 和can i在什么时候用,有什么区别? will和shall的区别will和shall的用法有什么区别吗? we will和we shall请问一下有区别吗?能不能用I shall呢