very frequently
I am missing you all the time.

to not get excited or upset
He liked studying in the calm library.

not to remember something
He forgets my name sometimes.

to make someone feel anxious or worried
Nowadays I have trouble sleeping well at night.

If you describe someone as moody, you mean that their feelings and behaviour change frequently, and in particular that they often become depressed or angry without any warning.
It is quite difficult to be a friend to someone who is very moody.

to hold a thought or image from the past in one's mind; to recall something from the past
I remember watching the first men landing on the moon.

quickly and unexpectedly
suddenly she realized that the stranger had a gun.

a watch that is attached to a band
He gave me this wristwatch as a birthday present.