1)在一般情况下,在动词原形后直接加词尾 –ing.
eg. go – going; do – doing; ask – asking; read --- reading
特别要注意:这和第三人称一般现在时的词尾变化不同,动词词尾如为“辅音字母 + y” 时不变,在其后直接加 –ing.
eg. study – studying; carry – carrying; fly – flying; worry – worrying;
2)在以不发音的e 结尾的动词后,去掉e,再加- ing.
eg. come – coming live – living dance – dancing make – making
3)在闭音节的单音节动词后、以重读闭音节结尾的多音节动词,而末尾只有一个辅音字母时,将这个辅音字母双写(x除外),然后再加 –ing.
sit – sitting; run – running; begin – beginning; forget – forgetting
4)在少数几个以 –ie 结尾的动词后:须将–ie 变作y,再加- ing.(这些动词词典一般均注明)
eg. die – dying; tie – tying lie – lying
1.表示现在( 指说话人说话时) 正在发生的事情。
We are waiting for you.
2.习惯进行:表示长期的或重复性的动作,说话时动作未必正在进行。
Mr. Green is writing another novel.
(说话时并未在写,只处于写作的状态。)
She is learning piano under Mr. Smith.
3.表示渐变的动词有:get, grow, become, turn, run, go, begin等。
The leaves are turning red.
It's getting warmer and warmer.
4.与always, constantly, forever 等词连用,表示反复发生的动作或持续存在的状态,往往带有说话人的主观色彩。
You are always changing your mind.