一般將來時(shí)主要用于：

　　表示將要發(fā)生的動作或情況

　　e.g. Tom will have a bike of his own.

　　與這個(gè)時(shí)態(tài)連用的時(shí)間狀語常用：

　　tonight, tomorrow, the day after tomorrow, next week, in three hours, two days later 等。

　　一般將來時(shí)態(tài)與其它結(jié)構(gòu)表將來情況的區(qū)別：

　　一般將來時(shí)態(tài) ：主要從時(shí)間的角度表將要發(fā)生的動作或情況。

　　be going to 結(jié)構(gòu) ：①表（主觀上）打算或準(zhǔn)備做某事時(shí)。 ②表有發(fā)生某事的預(yù)兆時(shí)。

　　e.g. They are going to have a competition with us in studies. It is going to rain.

　　據(jù)以上區(qū)別，故下面一句是錯(cuò)的：

　　I am going to be eighteen years old next year.

　　應(yīng)改為： I shall be eighteen years old next year.

　　be about to do sth 結(jié)構(gòu) ：意為"剛要做某事"、"馬上要做某事"強(qiáng)調(diào)時(shí)間之緊迫性。

　　e.g. We are about to discuss this problem.