1,Turningthefollowingimperativesintothetagquestionform:Don'tletthechildrenstayuptoolateonweekends.2,Turningthefollowingimperativesintothetagquestionform:Let'sdoittogether.3,Turningthefollowingstatementintoayes-noque

　　1,Turningthefollowingimperativesintothetagquestionform:

　　Don'tletthechildrenstayuptoolateonweekends.

　　2,Turningthefollowingimperativesintothetagquestionform:

　　Let'sdoittogether.

　　3,Turningthefollowingstatementintoayes-noquestion:

　　Ihavealreadyfinishedtheassignmenttheteathergaveuslastweek.

　　4,Turningthesingularnounsornounphrasesintopluralformswhereverpossiblewithothernecessarychances:

　　Atrafficaccidentoftenoccursatacrossroads.

　　5,Usingsubjunctivemood:

　　Aneighbouractedquicklyandthusstoppedthefirefromspreadingtotheotherfloors.

　　6,Usinganon-finiteverb:

　　Idon'tthinkshewouldadmitthatshehadsoldthehouse.

　　7,Combiningsentencesusingcomparativedegree(morethan)

　　Susanisintelligent.Maryisnotthatintelligent.

　　8,Rewritethefollowingsentenceusingadisjunct"

　　Itisnaturalthatasabeginnerheisn'tagooddriveryet.

　　9,Rewritethefollowingsentenceasrequired:(Using"eitheryouorI"asthesubject)

　　Wewereresponsibleforthemistake.

　　10,Combiningthesentencesintoonethatcontainsarelativeclause:

　　YousentmysonanEnglish-Chinesedictionary.Thankyouverymuch.