求下列动词的过去式和ing形式．

wait. waited, waiting
borrow. bought,borrowing
keep.kept,keeping
work. worked ,working
die. died,dying
wait.waited ,waiting
pick.picked,picking
try.tried,trying
return. returned ,returning
take took,taking

die died dying
take took taking
其他一律~d ~ing

wait-waited-waiting
borrow-borrowed-borrowing.
keep-kept-keeping.
work-worked-working.
die-died-dying.
pick-picked-picking.
try-tried-trying.
return-returned-returning.
take-took-taking