数学英语怎么写

我现在上高中英语越学越差,特别是阅读理解 英语be动词怎么解释? 关于英语be动词的问题,求高手给我讲解I————（be）at home today .怎么填?是am吗?然后就是 I————（be）in the library yesterday. 还是was吗?My sister————（be）in the supermarket just now. 是was吗?She be surprise at sb对吗? 什么意思? He was very surprised at the man .是什么意思? 名字加上is是什么意思 男的把女的的名字设置is 谁知道3 Doors Down 的when you re young歌词啊 已知:如图,四边形ABCD是矩形,PB=PC,求证:PA=PD. 英语翻译是古文翻译xiexie 1.里面有ye mr cool cool 的歌词的动感的韩国歌是什么 高潮部分一直是cool cool cool~2.里面有danger,高潮是da la,da la,da,qia li ,qia li ,cha,qiu ka,然后还有qiu ka qiu da da 的动感韩国歌曲是什么3.里面有mu la , 李斯非淳于越曰：“诸生.整篇文章及译文! There's no lose,when you are young.帮忙翻译一下这句话的真正含义. 李斯非淳于越曰.的译文 英文;for you look dowu, 以地卫君 非以君卫地 君其许之 翻译 我向许之,今日不了,亦一负心事 翻译 The villagers sell their ( ) to tourists.A.work B.works C.task D.job急 为什么as```as before有两个as,而as usual只有一个? show的英语句型show sb.sth.=show sth.( )sb.填空 each的同义词 The wind blows as usual.Flowers blooms as usual.The sun rises from the east as before.But something has changed they each have 2 dollar （改为同义词） as l have said before是什么意思 show的句型 英语翻译To show the white frozen surface of the sun catch extra heat is why forest fires in the Arctic tundra,which unfortunately are becoming more frequent,have the potential to accelerate the melting of ice in Greenland. Things in Irap seem to be going from bad to _____(更糟)根据句意及所给汉语意思写出所缺单词 deliverable list是什么意思 is,the,who,model,new,student怎么造句? iS.the.who.model.new.student.连词成句. psp火影忍者疾风传3 Use at least 3 Substitutions.这关我一老过不去! ____(who) is the new jackets? freja的爸爸是怎么知道百度FREJA吧的啊?