the children are growing very fast.they need more sleepthe children are growing very fast.可否换成the children grow very fast.或者the children growing very fast.they need more sleep可否换成they need to sleep more.
问题描述：
the children are growing very fast.they need more sleep
the children are growing very fast.可否换成the children grow very fast.或者the children growing very fast.
they need more sleep可否换成they need to sleep more.
答
可以，但more sleep在表达上更正确
答
第一个最好不要换,用进行时表示的是 孩子们“正在”长身体的阶段.这样意思比较强烈一点.如果没有are 结构不完整.逗号前是一个完整的句子,不能删掉谓语动词.后一个我觉得可以换成need to sleep more