I ask after ԃ, He ask after you / your health.
E ask for Ո(qng),Ҫ
I attached to ϵ,N,B;; 1.I was attached to the naval college as a special instructor for six months. 2. I am very attached to that car.
E pay attention to ע You must pay attention to the teacher.
A on (the/an) average ƽ,һf On average we receive five letters each day.
E right away ,R Do it right away!
I back and forth ص,(f) The chair rocked back and forth.
A back down/off ŗ,,˅s I saw that she was right, so I had to back down.
A back of ...,...
I.A back up ֧,Ԯ;
A., The policeman wouldn't have believed me if you hadn't backed me up.
I based on ...A(ch) His argument is based on facts.
I on the basis of ...A(ch) Society rested on the basis of the family.
E to begin with ,һc(din) =in the first place:We can't go.To begin with, it's too cold.Besides, we've no money
I on behalf of , The president is ill, so I'm speaking on his behalf.
I make believe b The children are making believe that they're princes and princesses.
I at best / at the best , At best the company will lose money this year-at worst it may have to close down.
I get the best of (zhn);еõ̎ They got the best of the other team at last.
E make the best of ,̎ to make the best of a bad job; He will make the best of the situation.
E do/ try
one's best M,Ŭ We must try our best to overcome the difficulty.