Have your mechanics finished yet?你们的机械师修好了吗?请问的是finished在这个句子中是过去式还是过去分词?方便的话展开一下

Have your mechanics finished yet?肯定回答 Have your mechanics finished yetHave your mechanics finished yet?句中的your mechanics是单三吗?如果是为什么不用has?Can your mechanics repair it?为什么第一句用finished,第二句用repair?第一句可以也用repair吗 have your mechanics finished yet?请问yet在这里是已经得意思吗? Have your mechanics finished yet?你们的机械师修好了吗?请问的是finished在这个句子中是过去式还是过去分词?方便的话展开一下 have和do作助动词的区别如题,在什么时候用have什么时候用do?例如：Have your mechanics finished yet?可以改成Did your mechanics finish yet?我就是问什么时候用HAVE什么时候用DO阿有详细点的说法没 再如：How mechanics school auto mechanics That's right.I drove it into a lamp-post.Can your mechanics repair it? governing mechanics是什么意思Though interlocking puzzles have been known for hundreds of years,very little is known about the governing mechanics.求翻译 用already,ever,never,just,yet填空I have____brought my car to the garage.The mechanics are working on it.Have you___been to Finland?I have___seen such interesting film.It's great.Have you told the truth to your father___?How delicious the food. Yes 用already、ever、never,just,yet填空1.I have_____brought my car to the garage.The mechanics are working on it.2.Have you_____been to Finland?3.I have_____seen such interesting film.It's great.4.Have you told the truth to your father_____?5.How de 1.The have some problems ____(travel) out.2.The mechanics need to keep______(work) on the car I have pursued my studying relativity and quantum mechanics这句英语是否有语病,语法结构是怎样的 theoretical mechanics是什么意思 theoretical mechanics是什么意思 fluid mechanics是什么意思 fluid mechanics是什么意思 QUANTUM MECHANICS怎么样