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地板
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发表于 2013-1-10 15:21:44
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14) 双写最后一个字母的-ing分词
初中阶段常见的有以下这些:
1.let→letting 让
hit→hitting 打、撞
cut→cutting 切、割
get→getting 取、得到
sit→sitting 坐
forget→forgetting 忘记
put→putting 放
set→setting 设置
babysit→babysitting 临时受雇照顾婴儿
2.shop→shopping 购物
trip→tripping 绊
stop→stopping 停止
drop→dropping 放弃
3.travel→travel(l)ing 旅游
swim→swimming 游泳
run→running 跑步
dig→digging 挖、掘
begin→beginning 开始
prefer→preferring 宁愿
plan→planning 计划
15) 肯定句变否定句及疑问句要变化的一些词
1.some变为any。如:
There are some birds in the tree.
→There aren't any birds in the tree.
但是,若在表示请邀请、请求的句子中,some可以不变。如:
Would you like some orange juice?
与此相关的一些不定代词如something, somebody等也要进行相应变化。
2.and变为or。如:
I have a knife and a ruler.
→I don't have a knife or a ruler.
3.a lot of (=lots of)变为many或much。如:
They have a lot of friends.(可数名词)
→They don't have many friends.
There is lots of orange in the bottle.(不可数名词)
→There isn't much orange in the bottle.
4.already变为yet。如:
I have been there already.
→I haven't been there yet.
16) in与after
in 与 after 都可以表示时间,但二者有所区别。
1.in 经常用于将来时的句子中,以现在为起点,表示将来一段时间。如:
He will leave for Beijing in a week.
一周后他会动身去北京。
2.after 经常用于过去时的句子中,以过去为起点,表示过去一段时间。如:
He left for Beijing after a week.
一周后他动身去了北京。
不过,如果after后跟的是具体的时刻,它也可用于将来时。如:
We will finish the work after ten o'clock.
十点后我们会完成工作的。
3.注意区分以下的in的用法。
I'll visit him in a week.
一周后我会去拜访他。
I'll visit him twice in a week.
一周内我会去拜访他两次。
17) 不定冠词a与an的使用
1.a 用在以辅音音素开头的单词前。如:
There is a "b" in the word "book".
单词book中有个字母b。
类似的字母还有:c, d, g, j, k, p, q, t, u, v, w, y, z。
She has a small knife.
她有一把小刀。
2.an 用于以元音音素开头的单词前。如:
There is an "i" in the word "onion".
单词onion中有个字母i。
类似的字母还有:a, e, f, h, l, m, n, o, r, s, x。
Do you have an umbrella?
你有一把雨伞吗?
3.以元音字母开头的单词前面不一定都用an;以辅音字母开头的单词前面也不一定都用a。如:
a useful book
a universe
a one-letter word
an hour
an uncle
an umbrella
an honest person
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