■ forget

forget to inf. 与 forget + -ing 意义是不同的。前者表示忘记了将来要做的事，后者表示忘记了过去做过的事。

• Jack forgot to buy sugar although I reminded him twice about it.尽管我两次提醒杰克要买白糖，他还是忘掉了。
• Jack forgot buying two pounds of sugar the day before.杰克忘记了自己前一天买过两磅白糖。

forget 的反义词 remember 也有同样的情况，remember to inf. 表示记得将来要做某事，remember + -ing 表示记得过去曾经做过某事。

• I remember meeting him for the first time five years ago.我记得五年前同他初次见面。
• I must remember to meet him at the station next Saturday.我必须记住星期六要同他在车站见面。