conceive做不及物动词时,有以下词组conceive of (doing)sth. 想象, 设想…
例句：It's difficult to conceive of traveling to the moon.难以想象到月球旅行会是什么样子.
I can not conceive of such cruelty as to take a child away from its mother.我真不能想象, 竟有把孩子从他母亲手里夺走这种残酷行为.
conceive做及物动词时,表示“想出（主意、计划等）；, 构想, 设想”
例句：You may conceive a new world in the atomic age.你可以设想出原子时代的新世界.
I conceived that there must be some difficulties.我料想到一定有些困难.
总结：conceive of 能表示想象的意思,所以这句话要加 of.
而conceive和conceive of的另外一个用法上的区别是：
1.conceive后面可接从句,或者名词.2.conceive of后可接名词或者动名词.
希望对楼主有帮助~~!