He Is Crying
他正在哭
"Tom, what's the matter with your brother?" asked the mother in the kitchen.
"汤姆，你弟弟怎么了？" 妈妈在厨房里问。
"He's crying."
"他在哭。"
"Oh, nothing, Mum," replied Tom. "I'm eating my cake. He is crying because I won't give him any."
"没事儿，妈妈，" 汤姆答道。"我在吃我的蛋糕。他哭是因为我不给他吃。"
"But has he finished his own cake?"
"他已经吃完自己的了么？"
"Yes." said Tom.
"是的。"
"And he also cried when I was helping him finish that."
"我帮他吃完时，他也哭了。"

1.what's the matter with…
what's the matter with sb的意思是某人怎么了？
一般来说，what's the matter with you比较偏向于类似医院场景的对话。

2.reply
reply表示“回答；答复”，既可以作及物动词也可以作不及物动词。如：
（1）The teacher replied to our questions.
老师回答了我们的问题。
He replied that he would come soon.
他回答说很快就来。
我们还可以说reply (to something) with something，如：
He replied with a smile.
他笑着回答。
（2）reply还可以用作名词，表示“答复；应答”。如：
I wrote my pen pal a reply in French.
我用法语给我的笔友回信。
There was no reply to the telephone.
电话没人接。
（3）reply和answer，这两个词都可以表示回答，reply比较正式，answer在口语中使用较多。
（4）reply的常用搭配：reply to 回复

3.finish
finish+doing sth
finish这个词后面永远接doing，不接to do
只能接动名词做宾语的动词常见的有：
避免错过少延期avoid, miss, put off,postpone
建议完成多练习suggest, finish, practice
喜欢想象经不住enjoy, imagine, can't help
承认否定与妒忌admit, deny, envy
逃避冒险莫原谅escape,risk, excuse,
忍受保持不介意stand, keep,mind.