分类：教育/科学-学习帮助
问题：英语动词的适当形式填空用所给动词的适当形式填空。1.Childr 
用所给动词的适当形式填空。1.hildren are often___(dress)up beautiful.2.He told us_____(not swim)in the river.3.The boy kept____(write)a letter to his pen pal until 11 o'clock last night.详细说说。谢谢 
回答：1.Children are often__dressed_(dress)up beautiful.

这是被动形式(be+过去分词)表示被怎样
be dressed up 被打扮

这里dressed是过去分词



2.He told us___not to swim__(not swim)in the river.
这里的 tell sb. (not) to do sth.是固定搭配


3.The boy kept _writing___(write)a letter to his pen pal until 11 o'clock last night.
这里的 keep doing sth.(一直做某事..)也是固定搭配
还有和keep有关的词组: keep+ 形容词 (保持...)