21.had better do sth/had better not do sth

　　22.in order to do sth

　　23.so as to do sth

　　24.besises/except/except for

　　25.as…as…

　　26.not as/so…as…

　　27.想要做某事

　　28.决定做某事

　　29.if虚拟语气

　　30.部分倒装句

　　31.强调句

　　32.remember/forget/go on/stop/try/mean/regret +to do sth/doing sth

　　33.rise/arise/raise/arouse

　　34.as soon as/no sooner…than…/hardly…when…/scarcely…when…

　　35.should do虚拟语气

　　36.cannot help doing sth

　　37.非限定性定语从句

　　38.it is kind of sb to do…

　　39.have a lot in common

　　40.put off