do did does done这四个都是动词吗

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• ①Who jumps highest in your class?—john ____.A.has done B.did C.does D.do我认为是选B 可答案是选C、 可跳高不已经是过去式了吗?②Today the forests have almost gone.People must____down too many tress .A.stop on cutB.stop from cuttingC.be stop to cut D.be stop from cuttingC③We must do everything we can ____ waste water from running intorivers.A.keep B.kept C.to keep D.keeping can 不是情态动词吗?后面难道不是接原型吗?④ She counldn't __ her words ___by the students.A.get understand B.get understood C
• do是动词原型 did动词过去式 done是动词的过去分词 doing是现在分词 都对吗
• 需要强调谓语时,用助动词do/ does或did.过去时用did,为什么后面的谓语动词用原形?不能过去式吗
• 英语反义疑问句选择题1.The workers can't have finished their work yet,____?a.have they b.do they C.are they D.can they百度上搜索到一个：陈述部分为can't have done,依情况用did,has,have.神马叫“依情况”= =汗 为什么选择A呢,D错在哪里~这边的have是使役动词吗?
• 谁能帮我讲解下这两道反义疑问句1.You had some trouble finding where I live,___a___?a.didn't you b.hadn't you c.do I d.don't I 我的想法是 had不当“有”讲的时候不是采用才用主动词do的相应形式了吗这句话的意思 是不是：你有些麻烦,那就是找我住在哪 不是吗2.There appeared to be no better way,___d____?a.was there b.were there c.did there d.didn't there这句话我压根就不明白 句子划分成分我也不明白 还有 be 和do 有什么不一样都是助动词原型这个道题我选的b强烈要求画一下句子成分
• do did does done doing这几个都是由do变化的那这里哪一个不是动词doing done究竟是动词还是不是动词吖
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• do did does done这四个都是动词吗
• 英语句子中没有实义动词是不是要加am is are有实义动词是不是要加do did done does
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