To concentrate on
to direct your attention or your efforts towards a particular activity, subject, or problem:
To remember
to be able to bring back a piece of information into your mind, or to keep a piece of information in your memory:
To think
to believe something or have an opinion or idea:
To imagine
to form or have a mental picture or idea of something:
To wonder
to ask yourself questions or express a wish to know about something:
To believe
to think that something is true, correct, or real:
to guess
to give an answer to a particular question when you do not have all the facts and so cannot be certain if you are correct:
to recognise
to know someone or something because you have seen or heard him or her or experienced it before:
to realise
to understand a situation, sometimes suddenly:
To suppose
to think that something is likely to be true:
