【正文】 ting as that one./That book is more interesting than this one.4 as…as possible/as…as sb canRun home as fast as possible/as fast as you can to tell your mother the good news.5 at risk/in danger/in troubleThe pandas in our country are at risk./in trouble/in danger6 at the age of…/when sb.+be+…years oldHis parents died when he was six years old./His parents died at the age of six.7 because of/due to/as a result of/with one’s help/thanks toBecause of?/Due to/As a result of his help, he passed this exam.With his help/With the help of him, he passed the exam./Thanks to his help, he passed the exam.8 be careful/look out/take careLook out!/Be careful/Take care! The flood is ing.9 be worried about/worry aboutLiu Ming is worried about his following oral test./Liu Ming can’t stop his following oral test.10 both…and…/not only…but also…He is not only a singer but also a doctor./He is both a singer and a doctor.11 be good at/do well inHe is good at drawing./He does well in drawing.12 be proud of/take pride inWe are all proud of our country’s astronaut./He takes pride in our country’s astronaut.13 e up with/think of/have an ideaTome came up an idea./Tom thought of an idea./Tom had an idea.14 ride a bike/go…by bikeHe often rides a bike to work./He often goes to work by bike.15 e from/be fromWhere do you e from?/Where are you from?16 have a good time/enjoy oneself//play happilyWe had a good time/enjoyed ourselves/played happily on Christmas Day.17 have a pain in head/have a headacheHe didn’t go to school today, because he had a pain in head./had a headache18 hear from/receive(get) a letter fromShe is very happy to hear from/receive a letter from a Canadian friend.19 had better do/It’s best to doYou had better read in the sun./It’s best for you to read in the sun.20 how about/what aboutHow about/What about going skating?21 in order to/in order that/to do/so thatHe worked day and night to be a successful man./He worked day and night in order to be a successful man./He worked day and night in order that he could be a successful man./He worked day and night so that he could be a successful man.22 keep off/keep away fromKeep off /Keep away from the grass!23 in/wearShe is in/wears a white dress today.24 keep sb. from doing/stop sb. (from) doing/prevent sb. (from) doingTrees can stop the soil flowing away./ Trees can prevent the soil flowing away./Trees can keep the soil from flowing away.25 learn …by oneself/ teach oneselfNobody taught him. He learnt it by himself./He taught himself.26 like …better than/prefer…to…/prefer to do…rather than do …John likes swimming better than skating./John prefers swimming to skating./John prefer to swim rather than skate.27 long, long ago/once upon a timeLong, long ago/Once upon a time, there was a beautiful princess living in an old castle.28 look after well/take good care ofThanks for looking after my cat /taking good care of my cat well while I was away.29 no longer/not …any longerShe is no longer a little girl./She is not a little girl any longer.30 shall we/Let’s..Shall we watch the film together?/Let’s watch the film together.31 take part in/join in/participate inHe took part in /joined in/participated in the match.32 too…to/so…that…/enough to…He is too busy to visit us./He is so busy that he can’t visit us./He is not free enough to visit us.三 同義句型互相轉(zhuǎn)換1運用兩種時態(tài)（一般過去時和現(xiàn)在完成時互相轉(zhuǎn)換）(1) He left last year.(2) He has been away for one year.(3) He has been away since a year ago.(4) It is a year since he left.(5) One year has passed since he left.2最高級和比較級的互相轉(zhuǎn)換(1) He is the tallest student in his class.(2) He is taller than any other student in his class.(3) He is taller than the other