新概念英语第一册47-48课课件下载

CHRITING: Do you like coffee, ANN? ANN: Yes, I do.
CHRITING : Do you want a cup? ANN : Yes,please.
CHRITING : Do you want any sugar? ANN:Yes, please.
CHRITING : Do you want any milk? ANN : No, thank you. I don't like milk in my coffee. I like black coffee. CHRITING : Do you like biscuits? ANN: Yes, I do.
CHRITING : Do you want one? ANN:Yes, please.
如果是be动词，就直接在be后加not构成否定式；将be提至主语前变一般疑问句。
如果是情态动词，就直接在情态动词后加not构成否定式；将can提至主语前变成一般疑问句。
do作实义动词时的意思是“做，实行，尽力”等，而在作助动词时没有意义,它的功能是在一般现在时和一般过去时中构成疑问句和否定句。