11. I can express my opinion

I think the school is excellent.	Yes. I agree.
He wants our opinion of the course.	I don't think it's very good
I thought it was a very funny book.	I agree with you. I loved it.
What do you think of London.	Personally, I don't like big cities.
I like this dress. What do you think?	I'm not sure. I think I prefer the other one.
Max said the course was a waste of money.	I disagree. I thought it was great.

think-thought have an opinion about something

excellent , very good

agree with someone have the same opinion as someone

opinion what you think about something

I don't think it's very good

personally You can use personally to introduce your opinion.

I'm not sure You can use I'm not sure to disagree politely.

prefer like one thing more than another

a waste of money a bad way to use your money (also a waste of time)