意识游记英语世界篇〈大纲5-6〉(5)

最容易忽视的集团【半助动词】1.be able to 2.be going to 3.be about to 4.had better...他们无法单独成句（像主动词那样单独做谓语动词），而且他们后面都加【动词原形】，所以是辅助主动词的。毕竟你没见过这样的句子吧eg：Tom is able to a apple.我们见到的都是Tom is able to eat a apple.
【be able to】可以表达将来的能力eg：I will be able to reach shool on time if I leave right now.〈注意was/were able to...常常表示“成功做成...”〉
【be going to,be about to,be to】跟will差不多，表示将要做某事。【be going to】主观能动性更强：计划做某事，很快就要做某事。I am going to eat lunch at 12AM today.【be about to】马上就要做某事，时间更短。【be to】表示被命令做某事或命中注定。eg：I think they are to fall in love with each other.

【had better】表示最好做...有忠告，警告的意思。eg：You had better follow me.〈had better等于'd better〉
未完待续...