英和和英

There are good grounds for believing what he says.

He must surely have some authority for what he said.

I see the justice of his remark.

He doesn't care (about) what people say.

You had better do whatever he says.

It is easy to understand what he is trying to say.

His statement has a show of reason in it.

You had best do as he says.

It's silly of you to trust him.＝You're silly to trust him.

I seem to understand him to a certain extent.

Take no [Don't take any] notice of what he says.

Don't mind [Don't take any notice of] what he says.

Oh, don't believe him. He's only kidding [pulling your leg].

He is too ready to believe―too credulous.

He makes sense.

Everyone believes his story since there is no evidence to the contrary.

He says his statement is true

He strongly asserts his statement to be true

He asserts the truth of his statement.

I think that his point is pertinent.

He makes out that he has a right to say so.

His meaning is quite plain.

His statement is void of sincerity.

Whatever he says is true.

Well now. Are those words to be trusted I wonder?

You should pay attention to what he says.

I could hardly believe him.

He is inventive of excuses.

It's fitting that he (should) say that.

It's fitting for him to say that.