怎么判断什么时态是一直在做的?答:2.时间状语:always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays。3.基本结构:动词+原形(如主语为第三人称单数,谓语动词上要加s,es,或变y为i,再加es)。4.否定形式:am/is/are+not;此时态的谓语动词若为行为动词,则在其前加don't,如...
Ihavefuninplayingfootballfor3month用什么时态答:F)在时间和条件状语从句里经常用一般现在(有时也用现在完成时)表示将来事情时间状语:always,usually,often,sometimes,everyweek(day,year,month?),onceaweek,onSundays,etc.基本结构:①be动词;②行为动词否定形式:①am/is/are+not;②此时态的谓语动词若为行为动词,则在其前加don't,如主语为第...
严格来讲,英语语法中是没有将来时态的,为什么答:Tom : I've caught a cold, doctor.5 、时间、条件、让步、方式状语从句表将要发生的动作时。e.g. Tomorrow we shall go for an outing unless it rains.与这种时态连用的时间状语常有: always, often, never, seldom, usually, once, a week, now 等。二、一般过去时主要用于:1 、表示...