may I和can I哪里不同

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• 1.You are my first good friend here.这里为什么用my而不用my the?2.My father can wear it for playing basketball.为什么用playing?3.many和much和lot of的区别.4.Let Kate come to Huaxing Clothes Store soon.为什么是come to 5.Mary needs a bag for school.为什么用for不用to?6.I'll take that pair of shoes.为什么用take不用want和need?7.这件绿色的T恤this green T-shirt为什么用this不用the?8.one和ones的用法.9.bring的对应词。
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• 在英语里面,疑问句中may i 和can i 有什么区别?分别在什么情况下使用恰当?