帮你出几题:

　　1.Iamreadingabooknow.

　　2.Hetakesoffhishat.

　　3.Iwillvisitmyfriendtomorrow.

　　4.Shehaddoneherhomework.

　　5.Shewenttoshoppingyesterday.

　　6.TheywillgotothezoonextMonday.

　　7.Wehadfinishedtheprojects.

　　8.Youhavebeenverynicetoyourfriends.

　　9.TomisgoingtoseeamoviewithJenny.

　　10.Bettyhasbeencookingsince2o'clockintheafternoon.

　　11.Isawalittlebeeflyingaroundtheredflower.

　　12.Johnnywasplayingfootballyesterday.

　　13.BobbywatchesTVeveryday.

　　14.Billyhasbeencheatinghismother.

　　15.Darcywillbethewinnerinthegame.