第1个回答 2009-04-29
一般放在谓语前面~
其时态随主语,后面接动词的原型~本回答被提问者采纳
第2个回答 2009-04-29
do放在谓语动词前表强调,其变形为does did两种形式
便于直观,尽以同一谓语动词为例:
现在时:
I do study hard.
He does study hard.
过去时:
I did study hard.
He did study hard.
第3个回答 2009-04-29
一般放动词前。
He does work hard and finish the job in time.
Do come and see us some day.