I will work hard to make my dream come true. 　　I hope your dream will come true one day. 　　It takes sb. +时间+to do… 　　Sb. spend（某种人称时态）+时间/钱+on sth./ (in) doing sth. 　　It's important/necessary/useful/useless/common…(for sb.) to v… 　　It's nice/kind of sb. to v.. 　　It's time for sb. to do sth. 　　It's a waste of time to… 　　It's …years/days since sb. +ved 　　It's great fun to do=sb. have great fun doing 　　It's a pity that… 　　It's an honor to… 　　I'm/We're not allowed to … 　　I'm afraid of making mistakes… 　　There be …doing… 　　Great changes have taken place in… 　　sth is/are well worth v-ing. 　　It seems/seemed that… 　　It seems (im)possible to v… 　　It is said that… 　　As the saying goes, … 　　…and …. are different in many ways. 　　too + adj./adv. to do 　　There are many differences between … and … 　　I have made up my mind to … 　　I am sure that… 　　I am not sure whether/if… 　　I would rather …. than … 　　It doesn't matter if… 　　Thank you for v-ing. 　　If everyone can make a contribution to the earth/ nature/ society, our life will be better and better.