【初一英语语法】初中英语语法知识点(3)

　　4、形容词的级

　　我们在对两个或以上的人或物进行对比时，则要使用比较或更高级形式。构成如下：

　　一) 一般在词后加er或est(如果是以e结尾则直接加r或st)。如：greater-greatest, shorter –shortest, taller –tallest, longer –longest, nicer- nicest, larger -largest

　　二)以重读闭音节结尾且1个元音字母+1个辅音字母(字母组合除外，如few-fewer fewest)结尾的双写结尾的辅音再加er /est。如：big-bigger biggest, red-redder reddest, hot-hotter hottest

　　三) 以辅音字母+y结尾的变y为i加er/est。如：happy-happier happiest, sorry-sorrier sorriest, friendly-friendlier friendliest(more friendly most friendly), busy-busier busiest, easy-easier easiest

　　四)特殊情况：(两好多坏，一少老远)

　　good/well - better best many/much - more most bad/ill – worse worst

　　little- less least old- older/elder oldest/eldest far- farther/further farthest/furthest

　　5、数词 (基变序，有规则;一、二、三，自己背;五、八、九、十二;其它后接th;y结尾，变为i, eth跟上去。) first, second, third; fifth, eighth, ninth, twelfth; seventh, tenth, thirteenth, hundredth; twenty-twentieth, forty-fortieth, ninety-ninetieth

　　二、初一英语语法——句式

　　1.陈述句

　　肯定陈述句 a) This is a book. (be动词)

　　b) He looks very young. (连系动词)

　　c) I want a sweat like this. (实义动词)

　　d) I can bring some things to school. (情态动词)

　　e) There’s a computer on my desk. (There be结构)

　　否定陈述句 a) These aren’t their books. b) They don’t look nice.

　　c) Kate doesn’t go to No. 4 Middle School. d) Kate can’t find her doll.

　　e) There isn’t a cat here. (=There’s no cat here.)

　　2. 祈使句

　　肯定祈使句 a) Please go and ask the man. b) Let’s learn English!

　　c) Come in, please.

　　否定祈使句a) Don’t be late. b) Don’t hurry.