现在正在做的事，时态用be(像is,am,are）+ing;或者是过去正在做的事，时态用be(was,were)+ing.
1.大多动词直接在词尾加-ing,比如：
go-going,work-working,study-studying,look-looking,do-doing, eat-eating,play-playing,read-reading,climb-climbing
2.有的以不发音的e字母结尾的动词,要去掉e再加- ing比如：make-making,write-writing,come-coming,make-making,take-taki ng,have-having,dance-dancing,
若结尾的e 发音,就不能去掉,如：see-seeing
3.以重读闭音节结尾,末尾只有一个辅音字母的动词,要双写这
一辅音字母,再加-ing.例如：run-running, swim-swimming, sit–sitting, put–putting, begin–beginning, hit-hitting
stop-stopping
如果结尾是元音字母加辅音字母组合,就直接加-ing.比如：drawing, playing。