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doing ; doing to do ; to do to do ; do do ; doing
am doing was doing do was did
will be doing had done will do is doing
after because while as soon as
doing, going to do, to go doing, to go to do, going
is doing my homework am doing my homework is doing our homework are doing our homework
do did was doing would do
is doing；came was doing；come was doing；came am going；comes
am doing did was doing do
nothing none no one other
go shopping going shopping do my homework doing my homework
did my homework am doing my homework do my homework was doing my homework
done doing being done had been done
did do was doing were doing
doing homeworks doing homework to do my homework do homework
was doing; watched did; was watching did; watched was doing; was watching
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