Here are a few expressions you can use to express your opinions.

To express your opinions, use an expression like I think … or I guess …

I think you are making a mistake.

I think we should help him.

I think that was a stupid thing to do.

I guess she is upset with your behavior.

The expressions I feel … and I reckon …. can also be used to express your opinions.

I feel you are right.

I reckon that was a mistake.

I really feel that he is cheating on me.

If you do not think that something is true, use the expressions I don’t think… or I don’t believe…

I don’t think that she is telling the truth.

I don’t think that we can trust him.

I don’t think that I have met you before.

I don’t think you’ve met my wife.

I don’t believe that they are at home.

If you want to ask people what they think about something, use the structure What do you think of…?

‘What do you think of my new hairstyle?’ ‘Frankly, my dear, it’s a disaster.’

What do you think of his new car?

‘What do you think of his new girlfriend?’ ‘She’s very pretty.’

To ask someone if they think something is a good idea, use the structure What do you think about…? or How about…?

What do you think about applying for that job? OR How about applying for that job?

What do you think about going on a vacation?

What do you think about hiring someone to babysit the kids?