1 句子结构和成分 句子分类 句子按结构可分为简单句、并列句和复合句。 考点1. 简单句 只有一个主语(或并列主语)和一个谓语(或并列谓语)。如： He often reads English in the morning. Tom and Mike are American boys. She likes drawing and often draws pictures for the wall newspapers. （画线部分为并列谓语，只有一个主语，仍为简单句。） 改错： It not only costs little money but also comfortable. 考点2. 并列句 改错： ①. He likes English, his English is very good. × ②. His wife was ill, he had to stay at home. × 当一个句子中含有两个简单句时，就要考虑两个简单句的连接问题了。直接用逗号连接两个简单句是错误的。 这时我们可以用 and, but, or 等并列连词来连接这两个句子；也可以用分号（;）来连接。此时，这两个简单句（此时也可称作分句）之间是并列关系，不能说一个分句作了另一个分句的什么成分。 用并列连词或分号连接起来的句子是并列句。 上两句可以改为： ①. He likes English；his English is very good. (用分号连接) He likes English, so/and his English is very good. ②. His wife was ill; he had to stay at home. (用分号连接) His wife was ill, so/and he had to stay at home. 考点3. 复合句 A. 用从属连词连接的句子是复合句。 还先看上面的两个错句： ①. He likes English, his English is very good. × ②. His wife was ill, he had to stay at home. × 我们还可以用从属连词来连接。这两句话可改为： ①. Becau se he likes English, his English is very good. When he likes English, his English is very good. 2 ②. Because his wife was ill, he had to stay at home. When his wife was ill, he had to stay at home. 先看第一个句子。当用because 连接时，译为“因为他喜欢英语，（所以）他的英语非常好”。主要说的是“他的英语非常好”，“他喜欢英语”是他英语好的原因。因此：“his English is very good”是主句，“because he likes English” 是原因状语从句。当用when 连接时，译为“当他喜欢英语时，他的英语非常好”。 主要说的是“他的英语非常好...
