1、fast的比較級(jí)是：faster。fast，。adj. 快的；迅速的；緊的；牢固的；放蕩的。adv. 快速地；緊緊地；放蕩地；深深地。n. 齋戒；禁食；系泊用具。2、He ran fast enough to catch the thief.他跑得飛快，足以抓住那小偷。3、The priest had only water and bread during his three week fast.牧師在三個(gè)星期的齋戒期間只進(jìn)食水和面包。