"I don't know" - I'm sorry, but I don't know the answer to that question.
"It's up to you" - It's up to you to decide what to do next.
"All right" - All right, let's get started.
"As soon as possible" - Can you please finish this task as soon as possible?
"I'm sorry" - I'm sorry, I didn't mean to upset you.
"Thank you" - Thank you for your help.
"At least" - He may not have passed the exam, but at least he tried.
"I'm afraid" - I'm afraid I can't make it to the meeting.
"I don't understand" - I don't understand what you're trying to say.
"It's not a big deal" - Don't worry, it's not a big deal.
"In order to" - You need to study hard in order to pass the test.
"I'm looking forward to" - I'm looking forward to seeing you again.
"As far as I know" - As far as I know, the party is still happening.
"It doesn't matter" - It doesn't matter which restaurant we go to.
"I see what you mean" - I see what you mean, that makes sense.
"On the other hand" - On the other hand, we could also try this