1.基本句式：“do/does/did+动词原形”
Do be quiet.I told you I had a headache.务必安静，我告诉过你，我头疼。
He does know the place well.他的确很熟悉这个地方。
He did tell me about it yesterday.他昨天的确告诉了我这件事。
He did phone you yesterday.他昨天的确给你打过电话。
【提示】 强调谓语只能对肯定句的一般现在时和一般过去时进行强调。