focus on +
The report focuses on the company's weak points.
fold * up +
Michael folded up the letter and put it in an envelope.
He left an hour ago and I'll be following on soon.
follow on from +
The next part of the play follows on from the discovery of the murder in the first act.
The project went wrong when the staff failed to follow through.
follow * up +
The police didn't follow up the allegations.
follow * up + (with)
The salesmen usually follow up a letter with a visit.
The teacher was angry because the class were fooling around.
fool about/around (with)
She suspects her husband is fooling around with one of her friends.
We've been forging ahead with the work and should be finished well before the deadline.
She forged ahead of the other runners and won.
freak * out +
(使) 大發雷霆；(使) 大吃一驚；(使) 極為恐懼；(使) 極度興奮
She freaked out completely when she didn't get the grades to get into university.