made the model (by) themselves中需要"by"吗?

来源：学生作业帮编辑：搜狗做题网作业帮分类：综合作业时间：2024/07/22 07:30:21

made the model (by) themselves中需要"by"吗?
1.The children made the model plane themslves还是by themselves?一般句子如"It's made by me"好像是要加by的,为什么用themslves时不用加呢?
2."There aren't any trees in the garden."中没有树,为什么要用tree的复数?还有"There are no seats left.",我看到的往往用seats,对此我也有和上一句话同样的问题.
3.（由于砍伐）the trees are gone.这句话，不是被动语态，也不是完成时，却用"gone"，请问这是什么用法？
4.-I'm going to Hainan.-________________.（选择答语），Enjoy yourself和Have a good trip同时出现在了备选答案中，若不是，请问该选哪个？有何区别？

我来详细给你就
1句中的themselves是反身代词做主语The children 的同位语,如果加by的话也可以,但它不同于"It's made by me”中的by（这是被动语态中表动作的执行者的介词,通常译为“被”）,此句若加了by是构成了短语by themselves（独自）,表示是孩子们自己（独自）做的飞机模型.
2句如果要改为单数也可以：There isn't a tree in the garden.或There is no seat left.但如果是要求把句子“There are some trees in the garden."变为否定句,你总不能变成There isn't a tree in the garden.
3.gone虽然是过去分词,但在这里当形容词用.（消失了,不见了）,表达的是一种状态.有好多动词有这个用法,如：broken,lost等.
4.当有人告诉你要外出时,应该回应：Have a good trip!
语言叙述不太好理解,不知你明白了没有,我是英语老师,如果还有疑问,请再提出来,我给与详细解释,希望能够帮到你!

made the model (by) themselves中需要"by"吗? Are Chinese gunships made by Chinese themselves? 英语翻译they often use the money which they made by themselves d their enemies are made jokes about by themselves They cleaned the kitchen by themselves by themselves意思 by themselves什么意思 study by themselves是什么意思? made by The students cleaned the classroom (by themselves)还是(themsel what's the chinese of"study by themselves"? They want -----------(finish)the work by themselves适当形式