I am considering working abroad. (= I am thinking of working abroad.)
He is considered to be the best person for the job. (= He is regarded as the best man for the job.)

Imagine living at 2,000 metres above sea level! (= What would it be like to live at 2,000 metres above sea level?)
I have imagined him to be much taller. (= I have expected him to be much taller.)

TO + infinitive or gerund: FORGET, REMEMBER, REGRET, GO ON, STOP, TRY
Verbs followed by TO + infinitive or the gerund with a change of meaning TO + infinitive or gerund: LIKE, HATE, PREFER, CAN'T BEAR