现在进行时和过去式的区分.高手进
问题描述：
现在进行时和过去式的区分.高手进
有几道题不太懂,麻烦讲解一下.
1.The thief（ ）in from the kitchen window as all the other windows and doors were closed
A.may climb B.must have climbed C.could climb D.should have climbed
2.I am sorry to keep you （ ）for a while ,for there is no chair .
A. stand B.standing C.stoodD .to stand
3.We saw him （ ）off the tree two days ago.
A.fell B.fall C.to fall D.faided
4.She （ ） （not play ） football these days .
5.How long （ ）your uncle （ ）（live）in Beijing.
请详细解答.谢谢~~~
另外.如何区分过去式和现在进行时,不要像是课本的.越通俗易懂越好
谢谢,可另给分.
额错了 ~~~是现在完成时...
答
1.b 现在完成时,小偷爬厨房的窗户对这几件事有影响.
2.b keep doing sth 继续做某事
3.a see sb do sth
4.haven't play these days是现在完成时标志
5.have lived 住在北京是过去的事,并且现在还在北京,对说话人这句话有一定的影响,所以用现在完成时.
现在完成时指,过去发生的事,并且一直持续到现在,并且对现在有一定的影响.