【doubt】doubtthat...和doubtif/whether用法有啥区别?举个例子

问题补充：

doubt that...和doubt if/whether 用法有啥区别?举个例子 英语

答案：

【答案】 楼主,你好doubt if 或that的用法1. doubt如果是动词引导宾语从句时,如果主句是肯定句,则宾语从句的引导词可用if/whether.

如：I doubt if/whether he is a student.

当然,如果此宾语从句中含有or/or not时,只能使用whether.

如：I doubt whether he is a student or not.

I doubt whether he is a student or a teacher.

另：doubt如果是动词引导宾语从句时,如果主句是否定句/疑问句,则宾语从句的引导词只能用that.

如：I don doubt that he is a student.

2. doubt如果是名词引导同位语从句时,如果主句是肯定句,则同位语从句的引导词只能用whether.

如：I have doubt whether he is a student.

doubt如果是名词引导同位语从句时,如果主句是否定句/疑问句,则同位语从句的引导词只能用that.

如：There is no doubt that he is a student.望采纳!