Key word: SEEM

Seem is a very useful verb for speculating.

1)    (Link verb) use to say that someone/something gives the impression of having a particular quality, or of happening in the way you describe. i.e. Everyone seems busy.

2)    (Transitive verb) use to describe your own thoughts/feelings, in order to make your statements less forceful. i.e. I seem to remember that you promised to work hard.

3)    (Transitive verb) use to say that you tried to do something and were unable to. i.e. I can´t seem to stop talking.