B e 动词旳几种形式与用法b e 动词涉及 am,i s,ar e.一.肯定式与否认式(以人称代词为例)肯定式否认式I a m a s t udent.I am n o t a student.He /She/It is...... H e /She/It i s not.......We/You/They are......W e/You/They are not ......肯定句:主语+ b e +其他。 否认句:主语+ b e + not +其他。I am a s t u den t. I a m n o t a d o c t or.She is Lucy. She i s no t Lil y.T h ey a r e at home, T hey are not a t scho o l.疑问式与简略回答疑问式简略回答Am I...... ?Y es, I am.No, I am not.Is he/ s he/ it......?Yes, he/ s he/ it is.N o, h e/ she/ it is n’tA re we/ y ou/ t h ey......?Y e s, we/ you/ t h e y are.N o, we/ yo u/ t h ey aren’ t一般疑问句:B e +主语+其他? 回答:Ye s, 主语+b e. / No, 主语+be+no t.A re y o u a te acher? Y es, I am. / No, I am n o t.Are yo u stu d ents? Yes, w e are . / N o, we aren’t.I s h e a wo r k e r? Y es, he i s. / N o, he i s n’t. 缩略形式肯定式否认式I am→I’mI’m not.you are →y o u’rey ou’re not. / you aren’t. he is→he’sshe is→she’s it is →it’she’s n ot. / he isn’t .s h e’s not. / she isn’t. i t’s n ot. / it isn’t. w e are→ we’r ethey are→ t h e y’rewe’r e not. / w e a ren’t .they’re not. / they we aren’t .eg: I’m a boy. I’m not a n u rse.Y ou’re t en years old. You’r e n ot our c l a s s ma t e s.She’s m y si ste r. Sh e’ not m y b r o t h er.B e动词旳用法口诀:I 用a m,you用 ar e,is连着他,她,它;单数名词用 is,复数名词全用a re.变疑问,往前提,句末问号莫丢弃; 变否认,更容易,be 后 not 莫忘掉疑问否认任你变,句首大写莫迟疑。课堂习题用 a...