凄凉的句子

He is playing football中playing football是动名词吗?表示正处于踢足球这一状态吗?这句中有be动词is,我知道这句是现在进行时,而is有时表达正处在某种状态,所以这里的playing football理解为动名词感觉 shelf 什么意思 it is not long before they are so accustomed to swimming.急it is not long before they are so accustomed to swimming 这里to后面的swim怎么可以用ing形式呢? he is playing football now 改为复数形式 HE as well as his brother _ _football now is played or is playingHE as well as his brother _ _football now 是 is played 还是is playing shelf SD敢达几号扭蛋机好?不要7200的和1万多的 shelf是什么意思 有How has she gone to school? 急求火山爆发导致恐龙灭绝的证据注意是 证据（比如说化石）,不用解释发生了什么.回答得快的一定追加,我知道还有其他原因像陨石撞击等等但现在只需要德干地盾的火山爆发的证据. Coidplay的单曲《yellow》yellow这个词是不是在英文中还有什么特别的意思? 图.纸上剖面图是怎么看. 剖面图怎么看 英语句子 Do the following survey 求这个图的剖面图 原癌基因与抑癌基因被激活是什么意思 原癌基因被激活才导致癌症,那是不是意味着原癌基因此前一直是休眠的 英语：I t () now pretty late,we took our things and retired to our room.1.is 2.being 3.turned 4.got为什么不是1 Only want you 英语作文We Can All Do It 典型的环境效应有哪些 用恰当的介词填空：James believe that robots will not be able to do the same things _____ we can. 大自然中还有哪些金蝉脱壳现象 英语题.1.You can do it____this way.2.I___to leave at once,or I "ll be late for the meeting.(tell,be told ,am told).3.they thought the potatos _______(be not)thin enough.4.they _______ _______(invent)hundreds of years ago. You can do it （l ） this. 有一块直角梯形地,上下底的比是3：4,如果上底增加6米,下底增加2米,这块地就成正方形,原来梯形的面积是多么平方米? I can find my bag.改为否定句怎么改呢? 怎样理解交通运输在城市化过程中的作用 The headmaster called on the students──（donate) their old books to the school library. 求知道硫化物相关化合物的化学方程式(请看题目)1.亚硫酸钡 转 硫酸钡2.亚硫酸 转 硫酸3.亚硫酸氢钠 转 硫酸氢钠 (可以一步转换吗?)4.亚硫酸钠 转 硫酸钠5.硫酸钠 与 二氧化硫 的互相转化6. Messi is __________ (对足球狂热), for he is a great football player .答案是：enthusiastic about football可以填：crazy about吗?