回答如下:英语句子结构:1. 简单句。它包括“主语+谓语+其他,并列主语+ 谓语+其他,主语+ 并列谓语+其他”。例如:He works hard. We know her. The book is mine / on the desk. (主系表结构)Tom is ill / out / a doctor. (主系表结构)2. 并列句。它的结构是:简单句 +并列连词 +简单句。另外,它的分句还可以含有从句,这种并列句亦称并列复合句。例如:He helps me with English and I help him with math. It was growing dark but she still went on with her work.Work hard, and you will make progress. Hurry up, or / otherwise you will be late. He didn't come, for he was ill. It rained yesterday, so we didn't go. Either you stay here or Mary stays here. The man who is sitting there is a doctor and his son works in the college. (并列复合句)The car that I bought two years ago was stolen a month ago, but the police haven't found the thief who has stolen it. (并列复合句)3. 复合句。复合句的构成是“主句+从句”,亦称为主从复合句。例如:When we arrived there, it was already dark. I know the man who is standing under the tree. He said that his father was a doctor. That is what he said. What he said is right.