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think - thought- thought drink-drank-drank sit-sat-sat lose-lost-lost have-had-had hear-heard-heard Sleep-slept-slept say-said-said find-found-found Read-read-read Give-gave-given tell-told-told take-took-taken understand-understood-understood come-came-come get-got-gotten Wear-wore-worn forget-forgot-forgotten

think thought thought 
drink drank drunk 
sit sat sat 
lose lost lost
have had had 
hear heard heard 
sleep slept slept 
find found found 
say said said
 fly flew flown 
read read read 
give  gave given 
tell told told 
take took taken 
understand understood understood 
come came come 
get got got 
wear wore worn 
forget forgot forgotten