1) shall用于第一人称,常被will 所代替. will 在陈述句中用于各人称,在争求意见时常用于第二人称. Which paragraph shall I read first. Will you be at home at seven this evening? 2) be going to +不定式,表示将来. a. 主语的意图,即将做某事. What are you going to do tomorrow? b. 计划,安排要发生的事. The play is going to be produced next month. c. 有迹象要发生的事 Look at the dark clouds, there is going to be a storm. 3) be +不定式表将来,按计划或正式安排将发生的事. We are to discuss the report next Saturday. 4) be about to +不定式,意为马上做某事. He is about to leave for Beijing. 注意：be about to 不能与tomorrow, next week 等表示明确将来时的时间状语连用.
