I think the calculator was invened before the computer.是什么从句,主从句的_英语解答

I think the calculator was invened before the computer.是什么从句,主从句的时态是?the calculator
与invent是_____关系,

人气：365 ℃　时间：2020-06-24 04:13:08

解答

这是宾语从句.
主句是一般现在时,从句是一般过去时.
the calculator与invent是被动关系.