Look!Tim isthrowing a ball这句话为什么要加is?

Look!Tim isthrowing a ball这句话为什么要加is? tim Tim Morning Tim,you look very well turned out today Tim and Jim are twins.They ________A.look like B.looks the same C.look the same D.looks like Tim is on duty today.Look!He _____ [clean]the blackboard. Look,is that boy Tim?_________________,but that boy is really thin.在空格中填入适当的句子,要附有解释.Look,is that boy Tim?No,_________________,but that boy is really thin. 完成句子:What()the girl look like?Is the man heavy()thin?What color()does Tim like?xie l window,please,look,open,at,the,it,and,Candy,(.) Tim,hi,younng,am,i,pioneer,am,i,a, tim是什么意思 One tim TIM是什么意思? DEAL TIM. Tim是什么意思 When Tim heard the fire alarm,he___quickly.(get up)When I was young,I____play witch candles.(can't)When Bob ____out of the window,he saw smoke.(look) Tim is_______ his book everywhere,but he can ’ t _____ it.A.looking at; findB.looking for; find C.finding; look forD.looking for; see 1、Look at the boy.He is 3 years old.(合为一句)Look at the ____ ____.2、Tim's address is No,25 Peace Road.(对 No,25 Peace Road提问)_______ _______ Tim's _____?3、she was very busy last Sunday.(同义句)she ____ a very busy ______ last Sund look