记录典型问题 分享教学方法
S: 学生 T:老师
S: 老师,肯定句变否定句时,不是and要变为or吗?为什么这个否定句中用and?
There is no water and no air on the moon.
T: 并列成分前都带有否定词时,要用and。
此句也可说成:
There is not water or air on the moon.
S: 那否定句中,还有什么情况下用and?
T: 小结一下:
1. 简单句中含有两个否定词时用and;
People can’t live without water and air.
2. 并列成分前各自都带有否定词时用and;
He has no brothers and no sisters.
3. and 构成的并列词组;
He didn’t want to work day and night.
4. 并列成分作主语时;
You and me can’t be friends.
5. 否定的祈使句中并列先后发生的两个动作时.
Don’t drink and drive.
S: 明白了。老师,如果or并列两个主语,谓语动词用单数还是复数?
T: 采取主谓一致中的就近原则,即A or B作主语时,谓语V和就近的B保持数的一致。比如:
He or you are right.
Rain or no rain is business as usual.
有雨或没雨都正常进行。
S: 老师,那疑问句中用and还是or?
T: 疑问句中,表选择时用or,即构成选择疑问句。表并列是and。比如:
Would you like tea or coffee?
你想要茶还是咖啡?
Would you like tea and coffee?
你想要茶和咖啡吗?
S: 明白了!
T: 练一练:用and或or填空。
1. It can’t be green, white, _____ black.
2. There are people without jobs ____ homes.
3. Don’t stop ____ write.
4. We can’t decide stay _____ leave.
5. It is of no great importance ___ no value.
(答案:1.or; 2. or; 3. and; 4. or; 5. and)
本节课教与学心得体会:
连词and与or的根本区别,就是其意义的不同:and表并列关系,叫并列连词;
or表选择关系,应该叫选择连词。
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