act英语语法点

Pu nctu ation Comma 1. He asked the question in a loud voice, but no one answered.（句子，连词+句子） 2. They travel on water in this simple but versatile boat. （在这个句子里，but 连接一个句子里的两个成分，说到底还是在一个句子里，所以不用逗号） 3. Unfortunately, Wang couldn’t come; and his absence made things difficult for us. （如果在前一个句子里有逗号了，这就要使用分号） 4. The little girl likes to sing, to dance, and to act. （逗号分割几个相同的东西，相当于中文的顿号） 5. Dr.Li, the chairman of the department, will speak at the meeting. （在这个句子里，Dr.Li 是句子的主语，the chairman of the department 是Dr.Li 的补充说明的同位语， 所以要用逗号把它割开方便读者区分） 6. Paolo, my Brazilian friend, was interested in music.（理由同上） 7. They are surprised to hear me talk about my Brazilian friend Paolo. （my Brazilian friend 是修饰Paolo 的，相当于apple tree, teacher Mark, woman nurse等） 8. Many volcanoes seem to be completely dormant, that is, unlikely to erupt soon.（that is 是插入语，所以要使用逗号或破折号分开 ,that is, 或者 ---that is---- 9. Not all viruses, however, straighten themselves out. （在这个句子里，主语是viruses，谓语动词是straighten。However 是用在一个句子中间的，所以前面用的是逗号。 而下面的例子，前后是两句独立完整的话，由以下这些 句子连词 连接，所以前面用的是句号） 10. We thought the figures were correct. However, we have now discovered some errors. Hence, Therefore, Nevertheless, Moreover, He didn't work hard. Thus he was fired. Otherwise, Besides, 11. These same computer users are more likely to wait until these problems get too bad to manage. （until 连接的分句在后，所以标点符号原则是 ①主句连词引导一个分句。 ② 连词引导一个分句，主句） 12. It’s nice to know that Joe’s Lunch Bucket. And its neighborly ambience are just a short wa...