妥加偏旁

有i needn't it 的说法吗既然直接用 't ,那不就代表是情态动词吗?那后面就应该加动词 而不是名词,所以请问有没有这种说法 还是用 i don't it? 请帮我回答3个自然科学的问题.（测量影子长度）如何利用影子测量高度?生活中有哪些这样例子?同一物体在同一地点的不同时间的影子长短如何?相同长度的物体同一时间在不同纬度的地区 what nationality is __ ————(him、his、 he)?选择哪个?为什么? "What is his nationality?"的中文意思 what is his nationality 后面如何回答? what is your nationality?what nationality are you?这两句用is或are是由助动词后的词决定的 what color is your favorite?what colors are your favorite?那么为什么这两句用is或are是由助动词前的词决定的呢? He is doing his homework,in the mean time,he is listening music.这句话这样翻译对吗. Don't be afraid of the dark.I'll stay with you.同义句Don't be afraid of the dark.I'll stay with you.(同义句)Don't ___ ___ ___ the dark.I'll stay with you. you needn't worry about it. 同义句.you _______________________ worry about it.说明原因. what is his favorite subject/?为什么要用his啊?不用he或者him Do you know what（ A his favorite song is B his favorite song _______you have breakfast every morning?yes,_______course.what about you?sometimes i sleep too long ,i get up very late.i have_________time to have breakfast._________you feel tirend and hungry if you don't have breakfast?yes,i______.______the way .w But this color is very He is doing his homework now.Don't b___him 请问什么叫做纯色?pure color 为什么氢会在空气中燃烧?这和太阳中氢的燃烧有什么区别? 氢在空气中燃烧,释放热量的是氢质子还是氢电子, 含有氢元素的物质在空气中燃烧一定会生成水吗 一群人去野营,一个帐篷住5个人,但却要多出15个人,但住6个人却刚刚好,那要多少个帐 个位英语大师,可以告诉我 Can you tell me ( ) is the way ( ) the zoo. 怎么填?汉语是：你能告诉我去公园怎么走吗?在请告诉我：live的现在分词是什么?speak的过去式是什么? 带喜欢却非恋人的女孩露营 两个人 两顶帐篷 要准备什么带女孩露营 两个人 两顶帐篷,我喜欢的一个女孩,现在要分开了!她劝我放手,现在想约她露营去, 在冬天的时候,车窗外面结薄冰很正常,但车里面玻璃上也常常会结一层薄雾或者薄冰,又不能用干布擦拭 怎样去除汽车风挡玻璃上的薄冰 The Blacks___many places of interest since they came to china.A will visit B.visited C.visitD.have visited 选哪个?说下为什么 The British boy __ to many places of interest since he came to ChinaA travelledB travelsC was travellingD has travelled The Whites______many piaces of interest since they came yo China 选择：Here is your coat,please_____.(A.put it on;B.put on it) please put on your coat 写反义句 为什么公交车的车窗是长方形的? 公交车车窗玻璃用脚能踹坏吗?四川公交车事件,看了令人心寒,死者安息.太惨目人睹了.不知道上面有没有铁锤用于砸玻璃的.只知道司机是第一个逃跑的.我想公交车里恐怕只有司机最清楚铁锤 物理 ：为什么公交车后车窗不能开 为什么公交车广告只贴车身不贴车窗?所有的公交车车身广告,顾名思义,只有车身有广告,所以常常看见有少了半个头的广告或者布置特别凌乱的广告,特难看,为什么不连车窗一起贴广告呢?无可