有:is,am,are,was,were,being,been.
现在时 I am, you are, he is, we are, you are, they are (缩略式 I'm, you're, he's, we're, you're, they're), (否定缩略式 I'm not, isn't, aren't), 过去时 I was, you were, he was, we were, you were, they were (过去时否定缩略式 wasn't, weren't), 过去分词been, 现在分词being
猜你喜欢
- 1我只想问你,若我回头,你还在不在?I just wanna ask,"Will you still be there if I come back?"
- 2印度洋海啸带来的思考
- 3一只电阻为100欧姆,功率为1/4W的电阻,他的电流额定值()A
- 4一台拖拉机耕地一亩耗油0.85KG,它的油箱容积式100L,柴油的密度是0.8X10的3次方千克每立方米,最多能耕地
- 5没有线粒体的细菌比如酵母菌如何进行有氧呼吸?
- 6一辆货车和一辆客车从相距299千米的两地相向而行客车每小时行40千米货车每小时行5
- 75名运动员进行200米赛跑,每条跑道宽约1.5米,弯道部分是半圆,如果最内圈跑到的起跑线已经画好,C
- 8P是椭圆上一定点,F1,F2是椭圆的两个焦点,若∠PF1F2=60°,∠PF2F1=30°,则椭圆的离心率为 _ .
- 9白居易在观刘麦一诗中,描写农民复杂矛盾的心理的句子是
- 10My father likes ____ books in the evening,he doesn't often ____ TV .a.watches see b.reading watch