英语强调谓语动词用do /does/did do，，必须满足两个条件
1.肯定句
2.谓语动词是实义动词的一般现在时或者一般过去时
①do /does/did do,表示“的确，确实”
Believe it or not ,he did win the first prize .
He did pass the exam .
She does hope you will get better soon .
I do hope you will stay for lunch .
He did come but soon went back .
She thinks I do not love her but I do
I did love you ,but now it is time to say goodbye.
②do 动词原形,表示“务必，一定”
Do remember to close the door .
Do stay in bed for a couple of days.
Do be careful .
Do come to the party tonight .
