介词+空间aat + homAre you going out tonight, or are you staying at homeat Jane's (house) / at my sist...

特指When it is clear which thing or person we mean.'Where's Tom?' 'In the kitchen.' ( = the kitchen of...

Dave used to work in a factory. Now he works in a supermarket.Dave used to work in a factory = he wo...

wilWe use will for the future (tomorrow / next week etc.) 一般未来时We do not use will for things we hav...

What are you doing tomorrowWe use am/is/are + -ing (present continuous) for something happening now...

I've just ...  I've already ...  I haven't ... yeI've just ...just = a short time agA: Axe Diane and Paul here...

have tI have to do something = it is necessary for me to do it, I am obliged to do imust and have t...

be doing / be going to dmigh

Vt &Transitive verb 及物动词/他动词[CD] Transitive verb: a verb that has an object.他动词如have，make等词，意念是不完...

PreviePasPresenFuturPast simple 一般过去Past continuous 过去进行Present simple 一般现在Present continuous 现在进行...