You understand the reason I cannot show my face even to members of the group.

He was beginning to understand the reason for her name.

And they certainly wouldn't understand her reasons for coming here.

But I can well understand her reasons for doing so.

But I don't understand the reason for doing something like this.

He didn't understand the questions, or the reason for them.

I do however can understand the reasons why, and I'm pretty sure they all did as well.

We didn't understand the good reasons why they couldn't be with us.

She seems to understand American ways, but not the reasons behind them.

We do hope that they understand our reasons for doing so.