1.we had better be careful.为什麽这里用be,而不是are?是因为had better 是情态动词,所以後面要跟be原型吗?be是am, is, are,的原型?2.下面,用a和one都对吗?one thousand pounds,a thousand poundsone thousand miles ,a thousand miles
问题描述：
1.we had better be careful.为什麽这里用be,而不是are?是因为had better 是情态动词,所以後面要跟be原型吗?be是am, is, are,的原型?
2.
下面,用a和one都对吗?
one thousand pounds,a thousand pounds
one thousand miles ,a thousand miles
答
1.词组是had better do sth. 你问的位置都要加动词原形
2. 语法上都对，one的词组更强调一千这个数字，a的词组不强调
答
had better 是情态动词,所以後面要跟be原型.be是am,is,are,的原型.
one thousand pounds,a thousand pounds
one thousand miles ,a thousand miles
都对