1. Our class could play soccer for a week without stopping.

　　我们班同学可以踢一周足球不休息。

　　without 介词，with的反义词，后加名词、代词或doing形式的动词，有时可以用if从句改写。例：

　　Without having breakfast, he hurried to school.

　　他没有吃早饭，匆忙上学去了。

　　Fish can't live without water. 没有水鱼不能活。

　　If there is no water, fish can't live.

　　2. That's very kind of you. 你真是太好了。

　　还可以说：That's very nice of you.

　　3. Wouldn't we get tired? 我们不会累吗?

　　此句是否定形式的一般疑问句，常用来表惊讶、责备、赞叹等语气。例：

　　Isn't it beautiful? 它不漂亮吗? (It is beautiful!)

　　注意答语：Yes, it is. 不，漂亮

　　No, it isn't. 是的，不漂亮。

　　Can't you come earlier? 你不能早来吗?(责备)

　　4. The Great Wall of China is more than 7,240 kilometres long.