I understand.
A2I comprehend.
I don't understand.
A2I don't comprehend.
Let me see.
A2Give me a moment to think/look.
I think so.
A2I believe that's correct.
I think not.
A2I believe that's incorrect.
I'm not sure.
A2I'm uncertain.
That's right.
A2That is correct.
That's wrong.
A2That is incorrect.
Please repeat that.
A2Please say that again.
Can you help me?
A2Will you assist me?
I need help.
A2I require assistance.
I'm finished.
A2I have completed my work.
I'm ready.
A2I am prepared.
I'm studying.
A2I am engaged in academic learning.
What does this mean?
A2What is the significance or definition of this?
Could you explain this?
A2Would you clarify this for me?
I'm confused.
A2I'm perplexed.
It's difficult.
A2It is challenging.
It's easy.
A2It is simple.
I need to study more.
A2I require additional study time.
To get to the point
B1To state the main idea directly.
In other words
B1To express something in a different way.
That's a good point
B1That's a valid or important observation.
To make sense
B1To be logical or understandable.