以下是引用ana9在2006-10-18 10:16:00的发言: 1. and连接parts of sentences前面不一定add逗号!
Theoretically, this convection would carry the continental plates along as though they were on a conveyor belt and would provide the forces needed to produce the split that occurs along the ridge.
(1)and 连接两个句子,主语一致省略,但前面并没有用逗号隔开!
The enclosed seas are an important feature of the earth’s surface, and seriously require explanation because, in addition to the enclosed seas that are developing at present behind island arcs, there are a number of older ones of possibly similar origin, such as the Gulf of Mexico, the Black Sea, and perhaps the North Sea. (2)and 连接两个句子,主语一致省略,但前面用逗号隔开了!
2.两个分别有独立主谓结构的并列句子中间用and连接, and前必须有逗号 第一句话之所以可以用and连接是因为and前后是2个实意动词(carry ,provide), 第二句话因为be动词are不能和实意动词require并列,故必须用逗号隔开。这句话同时告诉我们be动词和实意动词并列时如何处理。
asupls问的They were happy and they deserved their happiness. 后半句的they是不是需要省略呢?因为并列句主语相同? 这句话我认为不能省略后半句的they,省略以后就是be动词和实意动词并列。 请大家指正。 新手上路前面二次引用大家的发言没有成功,不好意思,大家将就看吧。
[此贴子已经被作者于2007-7-27 2:26:33编辑过] |