1.普通动词:格式+ing; think---thinking
sleep---sleeping
study---studying
speak---speaking
say---saying
cry---crying
2.以不发音的e结尾的动词:去掉e再加ing,格式:去e+ing
wake---waking make---making
come---coming
take---taking
leave---leaving
have---having
dance----dancing
ride----riding
write---writing
3. 以重读闭音节结尾,呈现“辅,元,辅”结构的动词,先双写末尾的辅音字母,再加ing
stop---stopping
sit---sitting
run---running
forget---forgetting
begin---beginning
cut---cutting
get---getting
hit---hitting
set---setting
swim----swimming
fit---fitting
dig---digging
shop---shopping
put---putting
travel---travelling(可双写也可不双写)
refer---referring
prefer---preferring
4. 以 ie 结尾的动词,把 ie 改为 y ,再加 ing
lie---lying
die---dying
tie---tying