it is kept tied to the earth by the earth's gravitational pull.这句话中的 kept tied to 为什么要用kept 跟 tied而且还是过去分词?它与tied to 连在一起又有什么意义?它们是什么时态?

it is kept tied to the earth by the earth's gravitational pull.这句话中的 kept tied to 为什么要用kept 跟 tied而且还是过去分词?它与tied to 连在一起又有什么意义?它们是什么时态? 帮忙看看下面的英语句子The moon is our nearest neighbour in space,and like ourselves it is kept tied to the earth by the earth's gravitational pull.请问kept tied to the earth She kept it tied to a tree in a field during the day and went to fetch it every evening怎么两个动词kept,tied Don't be afraid.The dog----to the treeA is tied B must tie C was tied D has tied is tied to be tied to sth.He is tied to this theory. 【英语选择题,要说为什么】A horse is（）to a tree.It looks a little（）.A.tied；tied B.tied；tried【英语选择题,要说为什么】A horse is（）to a tree.It looks a little（）.A.tied；tied B.tied；tried C.tying；tired What is it .you want me to see to?A.Having been kept B.To keep C.Having kept D.To have kept 请帮我分析一下这句话的句子结构,主谓宾等moon is kept tied to the earth by the earth's gravitational pull.这句话是不是被动语态?如果是为什么会有两个动词,kept和tied我都晕了 首字母填空 I kept the secret to m___ ,even didn't tell it to my parents. 5.If a claim is kept ______,it is more likely to be recognized. my destiny is tied to the demon statue. 1.He said,___a long way to school.___a long way to go before we arrive.答案是C为什么不选BA.It is;It is B.There is;It is C.It is;There is D.There is；There is2.Tom's mother kept telling him that he should work hard,but___didn't help.答案 Although it is awfully cold this winter,we have kept physical training without interruption,___?A isn't it B haven't it -Sorry to have kept you waiting for so long a time.Sorry to have kept you waiting for so long a time.-_____________.Not at all Don't say so I don't think so It doesn't matter The ( ) it is kept,the sweeter it will be Medicine is dangerous for children,so it should be kept away___ them.A.by B.to C.from D.of 初中英语选择体1.________ to the meeting on time tomorrow. It’s very important. A. Don’t come B. Do come C. Not come D. Coming 2. The young tree the stick . A. should be tied to B. must be tied by C. should tie t