I have been skating _____ nine oclock.A.for B.since C.at D.from

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Ihavebeenskating_____nineoclock.A.forB.sinceC.atD.fromIhavebeenskating_____nineoclock.A.forB.sinceC.

I have been skating _____ nine oclock.A.for B.since C.at D.from
I have been skating _____ nine oclock.A.for B.since C.at D.from

I have been skating _____ nine oclock.A.for B.since C.at D.from
B
since 从.以来, 一般和现在完成时连用. 注意题干中的 have been skating 现在完成进行时

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B,since是现在完成时的标志,后面不是一段时间不能用for

have been doing是现在完成进行时,强调从过去某一时间开始的动作且这个动作可能会持续到将来某个时间。因此选择B.但是A也可能会成为你想选择的答案,因为现在进行完成时还表示从过去某一时间开始的动作并且是在说话的时候结束的,但是根据语气就不难判断这道题的考点是现在进行完成时的前一种情况了,而C、D这两个选项首先就直接排除了。...

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have been doing是现在完成进行时,强调从过去某一时间开始的动作且这个动作可能会持续到将来某个时间。因此选择B.但是A也可能会成为你想选择的答案,因为现在进行完成时还表示从过去某一时间开始的动作并且是在说话的时候结束的,但是根据语气就不难判断这道题的考点是现在进行完成时的前一种情况了,而C、D这两个选项首先就直接排除了。

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since + 时间点(= 自从··· 以来),常与完成时态连用,如:He has lived in this house since he came here.(= 自从他来到这里,他就一直住在这房子里);
nine o'clock( = 九点钟),时间点;have been skating(= 一直在滑冰),现在完成进行时候;
句子的意思是:我从九点一直滑冰到现...

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since + 时间点(= 自从··· 以来),常与完成时态连用,如:He has lived in this house since he came here.(= 自从他来到这里,他就一直住在这房子里);
nine o'clock( = 九点钟),时间点;have been skating(= 一直在滑冰),现在完成进行时候;
句子的意思是:我从九点一直滑冰到现在;
for + 时间段(= 有···时间了),也常与完成时态连用,如:He has lived in this house for about three years.(= 他在这房子里已经住了大约三年了);
since 和 for 可说是完成时态的明显标志。

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i have been skating since nine years 八年级下册英语书语法:How long have you been skating?I've been skating since nine o'clock. I have been skating _____ nine oclock.A.for B.since C.at D.from I have been skating for 3 years.=I have _____ _____ I came here.急.I have been skating for 3 years.= I _____ to _____ _____ _____ ago. i have been skating() nine o'clock A for Bsince C at D fromWHY ,GIVE ME SOME REASONS 1.i think i'll ride my bike.2.if you do ,you'll be late.3.i think i'm going to stay at home.4.if you do,you'll be sorry.5.how long have you been skating.6.i've been skating for five hours.7.i've been skating since nine o'clock.8.how long did you skat how long have you been skating?怎么回答 -I saw Jim and your brother in the park yesterday morning.-they ---- skating there,right?A.practiced B.were practicing C.have practiced D.have been practicing They have been skating for five hours 同义句 They have been skating_______ _____ ________ ______ 2 the earthquake is a ____( 自然 )disaster 3 i have been skating s_____ iwas seven years old 4 i'm I skated for four hours与I have been skating for four hours的区别最好详细点,说的明白点 How long didi you skate today?How long did you skate today?How long have you been skating today?Was this your first skating marathon?Do you skate every day?When did you get your first pair of skates?How long have you been skating?No, I skated in a ma 【急!】have been skating与have ever received怎么区别 在线等.have been skating与have ever received怎么区别? -How long did you skate?-I skated for two hours.第一句中”did”” skate”能换成”have””been skating”?为什么? how long have you been skating?这句里有的been,是属于什么句型.有点忘了. I have been selling I have been trying I have ever been