Keep is a neat little word.
Generally it means to hold onto something, to save it instead of giving it away. For example:
I think I'll keep this book. It's one of my favorites.
But we also use it in many idioms and phrasal verbs:
You can keep quiet if you don't want to speak.
You can keep a tradition.
You can keep a secret--if you don't tell!
You can keep a promise (or keep your word) if you do what you said you'd do.
Someone may tell you to "Keep a lid on it" because they don't want you to tell anyone about it.
Some people try to keep up with the Joneses--to have everything someone else has--especially expensive things, like a car, house, etc.
In a race, you try to keep up with the fastest runner (or the fastest driver in a car race), or to keep up with the best students in class.
If you are lonely you may ask a friend to keep you company (spend time with you).
If you are impatient, someone may tell you to "Keep your shirt on, I'll be there in a minute."
My English teacher used to say "Keep your wits about you" when she wanted us to think clearly during an exam.
I keep on trying to learn Polish. I won't give up.
If you want to encourage someone not to give up, you might say "Keep on keepin' on!"
It's hard to keep track of all my friends on Skype! Keep in mind (remember) I have a lot of them!
He was being serious, but his expression was so funny, I could hardly keep a straight face (I almost laughed).
Would you keep an eye on my house while I'm on vacation?
Please keep in touch. Write again when you have time.
It's hard to keep my cool when I'm angry.
My neighbors are very loud sometimes. The noise can keep me up late at night. I can't sleep.
If it was hard for you to keep up with all these examples, that's OK. Keep trying!
