The cats are running along the wall.这里的cats为什么要加s?

The cats are running along the wall.这里的cats为什么要加s? The cats are (running the tree) 对括号里的提问 英语连词成句along,the,are,running,the,cats,wall look!two cats are------up the treea.runing b.looking c.running d.fiying Frank has some cats.there are (1)running in the room.You can see there is a cat in front of two cats,a cats behind two cats,and a cat between two cats. Two cats are ____ the tree.There are some birds in the tree.THey want to catch the birds!A.eating B.walking C.climing D.running 用介词或介词短语提问:1.The aeroplane is flying_____thevillage.2.The children are swimming_____the river.3.Two cats are running _____the wall.4.The boy is jumping _____the branch.5.The teacher is standing_____the blackboard.6.The blackboard two cats are running ____the wall on along 都可以吗 The rivers are running dry.running什么意思 The Cats are play with the ball.怎么改? 就括号部分提问 They (worked hard) yesterday afternoon.介词填空Two cats are running ________ the wall.翻译1.一分钟以前汤姆和他的老师打招呼.2.一小时以前他与那个助手谈话. two cats are running across the wall.这句话这么说行不行我想描述的是这样的画面，而非墙上有一个洞，猫从里面穿过去 The rivers are running dry.翻译下 The police are running a_____the thief. they are really running you into the The airplane is flying the village.2.The ship is going the bridge.3.The boy is swimming the river.4.My books are the shelf.5.Two cats are running the wall.6.The bottle of milk is the refrigerator.7 The boy is jumping the branch.8.Mary is sitting her 英语翻译1 The aeroplane is flying over the village.2 The ship is going under the bridge.3 The boy is swimming across the river.4 Two cats are running along the wall.5 My books are on the shelf.6 The bottle of milk is in the refrigerator.7 The boy I like the cats.Because they are f________.