"Let us say that he did not tell the truth"
"Let's say you had a lot of money--what would you do?"
"I imagine she earned a lot of money with her new novel"
"I thought to find her in a bad state"
"he didn't think to find her in the kitchen"
"I guess she is angry at me for standing her up"
"Scientists supposed that large dinosaurs lived in swamps"
"I presuppose that you have done your work"
"This step presupposes two prior ones"
I suppose (that) he is about forty.
我猜他大概四十岁。
Suppose he is absent, what shall we do?
假设他缺席了,我们要怎么办?
Suppose you come to my house tomorrow morning, and I will show you all my books.
我建议你明天早晨来我加,我会把我所有的书都展示给你看。