we have been best friends for a long time中friends为什么要加s

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• We have been good friends a long time.这里的a long time之前不用加for吗?为什么?
• 找出下面句子中的错误,并改正!(英语类)1.Would you like to come to having supper?2.My friend Tim usually play table tennis with his classmates.3.A long time ago ,people think the sun went aroud the earth.But now,we know the earth go around the sun.4.Jim,do you want to buy a MP4?5.Have you got much friends in America?6.Is there lots of rainy this summer in your city?7.You must play with fire.It's dangerous.8.Two years later,the Olympic Games will be hold in China.9.some
• 几道英语时态题,4.clint woke up in the middle of last night .he was frightened and didn't know where he was.he(had been dreaming)7.we were good friends.we (had knowed) each other for a long time.9.yesterday i saw leon sitting on the ground.he was out of breath.he (had been running)为什么要用这些时态啊22.he ( ) several novels since 1985.most of them ( ) quite successful,but the last one ( )very good reviews.A has written/were/hasn't gotB wrote/have been/didn't getC has
• we have been best friends for a long time中friends为什么要加s
• We have been good friends a long time.这里的a long time之前不用加for吗?为什么?
• we have been best friends for a long time 为什么best前不加the
• 关于have been 的用法we( )best friends for a long time.A.are B.have C.has beenc D.have been应该选那个呢?havebeen 的用法又是什么呢?
• 英语中的基数词和序数词怎样应用1.如果说两千two thousand,那么thousand后面就不加s,如果thousand后面有of那thousand后就加s,2.please turn to page twenty-five.这句话的25页中间用-连接,还有什么情况下用-连接?3.序数词和基数词在分数情况下怎么运用?比如3分之2怎么说?4.I have not had time to clear up,so I am all at sixes and sevens.这句话为什么数字后面要加s?5.We will have to do the experiment a second time.这句话中second中前用了a为什么?什么情况下用定冠词the?6.May is the fifth month of the year.7.什么情况下用序数词什么情况下用基数词?希望知道的人可以逐题回答我,
• we have been best friends for a long time中friends为什么要加s
• we have been best friends for a long time 为什么best前不加the
• They have been collecting shells for there years.（改为同义句）Has Tom been skating for hours?(做否定回答）My mother has been collecting stamps for about ten years.(向画线句子提问）
• 同义句转换：we have been friends for 10 yearswe have been friends for 10 yearsIt ___________10 years _____________.