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小学1-6年级英语知识点:介词

来源:网络整理 2024-01-11 16:03:25

  介词

  介词后要么不加动词,加动词只能加动词ing形式

  如:be good at running;

  do well in jumping;

  时间介词

  季节前,月份前用介词in

  如:in summer;in March

  具体的哪一天如星期几,几月几日用介词on

  如:on Saturday; on the second of April; on Wednesday morning

  在几点钟前用介词at

  如:at a quarter to four;

  只在上下午晚上用in

  如:in the morning/ afternoon/ evening;

  但在夜间用at night。

  另:季节,月份和星期前不好加the.

  名词复数构成的方法

  有规则的有:

  (1)直接在名词后加s

  如orange—oranges; photo—photos;

  (2) 以x, s, sh, ch 结尾的加es

  如:box—boxes; glass—glasses; waitress—waitresses; watch—watches;peach--peaches

  (3) 以辅音字母加y结尾的改y为i加es

  如:study—studies;library—libraries; hobby—hobbies; family—families;

  (4)以f, fe结尾的改f, fe 为v+es如:knife—knives; thief—thieves(注:以o结尾的我们学过的只有mango加es, mango—mangoes其余加s,)

  不规则的有:

  man—men; woman—women; people—people; child—children

  动词第三人称单数的构成

  (1)直接在动词后加s

  如:run—runs; dance—dances

  (2)以s,sh,ch,o结尾的加es

  如:do—does;go—goes;wash—washes;catch—catches

  (3)以辅音字母加y结尾的改y为i加es

  如:study—studies; carry—carries;

  现在分词的构成

  (1)直接在动词后加ing

  如:sing—singing; ski—skiing;

  (2)双写词尾加ing

  如:swim—swimming; jog—jogging;run—running;

  (3)以不发音的e结尾的去e加ing

  如:ride—riding; dance—dancing; make—making;

  规则动词过去式的构成

  (1)直接在动词后加ed

  如:clean—cleaned; milk—milked; play—played;

  (2)以e结尾的直接加d

  如:dance—danced; taste—tasted;

  (3) 以辅音字母加y结尾的改y为i加ed

  如:study—studied;carry—carried;

  (4)双写词尾加ed

  如:stop—stopped; jog—jogged;

  不规则的有:am,is—was; are—were; do,does—did; have,has—had; go—went; meet—met; sit—sat; see—saw; get—got; tell—told; run—ran; come—came; steal—stole; read—read;

  形容词副词比较级的构成

  规则的:

  (1)直接在形容词或副词后加er

  如;small—smaller; low—lower;

  (2)以e结尾的加r

  如:late—larer;

  (3)双写词尾加er

  如:big—bigger; thin—thinner; fat—fatter;

  (4) 以辅音字母加y结尾的改y为i加er

  如:heavy—heavier; early—earlier;

  不规则的有:

  good, well—better(最高级为best); many, much--- more(最高级为most); far---farther;

  rain与snow的用法

  (1)作为名词意思是雨水和雪是不可数名词

  如:There is a lot of rain there in spring. 那儿的春天有很多雨水。

  (2) 作为动词意思是下雨和下雪,有四种形式分别是:

  动词原形rain, snow;

  第三人称单数rains ,snows;

  现在分词raining;snowing

  过去式rained;snowed;

  如:

  ①Look! It is raining now. 瞧!天正在下雨。

  ②It often rains in Nantong in summer.南通夏天经常下雨。

  ③ It rained yesterday.昨天下了雨。

  ④It is going to rain tomorrow. 明天要下雨。

  (3)形容词为rainy 和snowy 意思是有雨的和有雪的

  如:It is often rainy here in spring.这儿的春天经常是有雨的。

  If it is rainy tomorrow, I’ll stay at home.如果明天是有雨的,我将呆在家里。

  网提醒:

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