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every year/day/week...
一般在动词原形后+s
play
plays
以s x ch sh结尾的动词+es
watch
brush
以辅音+y结尾的动词,把y变i加es
study
studies
特殊变化
go
have
do
动词单三形式的变化规则:
goes
has
does
watches
brushes
The twins ______(wash) the clothes every day.
Sometimes he ________ (play) basketball over there.
How often ____ Sally ______(sing)?
wash
plays
does
sing
Lily
Lucy
现在进行时: Present Progressive