I think that your old dress suited you much better than this one.

Parents generally believe that their children will follow in their footsteps.

Do you suppose that the currency rate will continue to raise ?

In my opinion, she is just another girl he is going to dump after the summer holidays.

Informal. They guess we have switched dresses for the New Year's Eve party.

Informal. One of your classmates reckons that you have made up a story about a broken leg in order not to go to school. 

Personally speaking, I consider her behaviour quite unacceptable under given circumstances.

To my mind, he commited the worst ever made mistake when turned down the Genesys company's job offer.

As far as I’m concerned, the global warming issue should be tackled with a bit of enthusiasm.