that引导宾语从句时,常因其无词义而被省略。但在下列情况下,that不能省略。 1.当有两个或两个以上并列的从句时,头一个从句中的that可以省略,后面从句中的that不可省略,否则会造成对原句的误解。如: When guiding an object clause, it is often omitted because it has no meaning. But in the following cases, that cannot be omitted. 1. When there are two or more parallel clauses, that in the first clause can be omitted, and that in the latter clause cannot be omitted, otherwise it will cause misunderstanding of the original sentence. Such as: