重點講解：
1. used to do sth.
過去常常；過去曾做某事；
eg. We used to compete on just cost.
我們曾經僅僅在成本上競爭HL(5~r!GjANS*;b2。
eg. Marjorie Baer used to joke about her retirement plans.
瑪喬麗貝爾曾經拿她的退休計劃開玩笑nVebuBr;g3Uc5。
2. first of all
第一；首先；
eg. My aim was first of all to determine what I should do next.
我的目標首先是要確定自己下一步該做什么TQeXwGE_Z=Fy@。
eg. First of all, to try to keep calm at the interview.
首先，面試時要保持鎮靜K#%*F..[Ar*RtH#。
3. keep sb. from doing sth.
阻止（或防止、阻礙）…做某事；
eg. Embarrassment has kept me from doing all sorts of things.
我總是害怕受窘，什么事都不敢去做*C53gBIVuoQ[Xy。
eg. He kept her from being lonely.
他不讓她感到孤獨niebYdaOOCBl^。