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-----HowlongshouldIplaywithmypeteveryday?-----.A.sometimeB.sometimeC.sometimesD.sometimes求正解,若是能再给俺介绍一下这四个词的用法那就更好了~

题目详情
-----How long should I play with my pet every day?
-----_________.
A.sometime B.some time C.sometimes D.some times
求正解,若是能再给俺介绍一下这四个词的用法那就更好了~
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答案和解析
本题问的是how long(多长时间),所以应该选B
(1)sometimes的意思是“有时”,是副词.例如:
Sometimes he comes by bike and sometimes by bus.
他有时骑车来,有时乘公共汽车来.
(2)sometime也是副词,意思是“在某个时候”.可用于一般过去时与将来时.例如:
You can hand in your homework sometime before Friday.
你可以在周五前某个时候交作业.
(3)some time是名词短语,它的意思是“一段时间”.例如:
I'll be away for some time.我将离开一段时间.
(4)some times也是一个名词短语,time在这里用作可数名词,意思是“次数”.
some times的意思是“几次”.例如:
I have been to the Great Wall some times.
(题外话:我也是从别处copy来的 :D )