英语中用适当形式填空怎么写。

单数（singular）复数(plural) 只有名词才会有单数或复数，名词又分可数和不可数（可数就是能一个或一枚1 2 3 4 5 6 7 8 9...这样数数的称可数，不可数分抽象的不成形的...等，）不可数名词不能有单，复数表现，例：dog, cat ,duck ,tiger, lion, zebra,squirrel,cup,pan，spoon，chopsticks,bowl，knife...等 这些普通名词，我们都可以在后加上S/ES表复数或不加表单数。例：我看到一只狗，i saw a dog ,我看到5条狗：i saw five dogs。不可数：sand，water，money,air,music,gas,oil，blood,glass,wood,bread，fish,chinese...等，其中不可数的部份要加度量单位加of ，例：一条面包，a loaf of bread,两条面包：two loaves(loaf) of bread,抽象的也就是看不到的摸不到的，例：一阵风吹过来，here a gust wind come,我听过很多音乐，i've heard a lot of music，句型转换太多了，举一例：你今天要卖很多东西，1you have to buy many things today,2there 's a lot of things you have to buy today,3you must go shopping today,转一般疑问：1 must you buy many things today? 2 is there a lot of things you have to buy?第二：我妹妹让我帮她写作业，1my sister let me do the homework with her ,2my sister asked me for help with the homework这两改被动，3i was made to do the homework with my sis by her, 4 i was asked for help with the hoemwork with my sis by here,转一般问句：1will my sis let me help her with the work ,转间接疑问2my sister asked me if (whether) i have a time to help her wiht the work,.3 was i made to do the homework for her by my sis
.看起来都是妹妹要求有强烈口气，呵呵... 好了就写这么多，你一分都不出。没法再写下去～！

可数名词，是一个的就用单数，两个以上用复数；不可数名词只有单数形式；句型转换大都是变成一般疑问句、对划线部分提问一类的。如果是变一般疑问句，有am,is are 的直接把他们提前；没有的话，加do 或does；如果有can 就把它提前；对划线部分提问，写出疑问词就可以了，然后把剩下的部分给成一般疑问句就ok了。

单复数看具体的语义环境。句型转换你得给个例子结合讲。要不然没法说

看书本后面的附录就够用了