还是我this is the pen used by me 再问一个 在么?I saw her clean the classroom.这个是不定式 I saw her cleaning the classroom.这个现在分词 能否用 过去分词 代替过去 I saw her cleaned the classroom` 效果和I saw her clean

this the the pen,the pen is nice . This is pen.how much is the pen 这支钢笔是红色的.英语到底是This pen is red.还是The pen is red. This is his pen,The pen b___ to him This is my a pen?对还是This is a my pen?对This is my pen？ What is this 是This is a pen.还是.It is a pen?为什么? This is a pencil and a pen还是This are a pencil and a pen,二楼说的也许对，但我只问用IS还是ARE what is that in English?是It is a pen还是This si a pen还是That is a pen ①This the pen is mine.( ) ②This pen is mine.( ) 嘻嘻…… this is the same kind of pen（ ）和我昨天丢失的一样 This pen is broken.(同义句改写)Something is ( ) ( ) this pen.急五份内后我下线! this is our pen---------------- This pen is beautiful? This pen is yours This is not her pen.()(her) is on the desk This is( )good pen ( )color of theWis biack This is Jim.His pen is the red.改错 have u seen a pen1.Have u seen a pen i left it here this morning. Is it____black one?I think I saw it somewhere. the 还是a 为什么呢 2.____fire broke out last night.They managed to put out ____first soon.A the the B the a C a the D / the how