Fill in the missing forms.Заранее спасибо

1)sit 2)sung 3)stand, stood 4)run 5)put, put 6)sleep, slept 7)taught 8)think, thought 9)understood, understood 10)wear

sit  sat  sat sing  sang sung stand  stood  stood ran  run  ran put  put  put sleep  slept  slept teach taught  taught think  thought  thought understand  understood  understood wear wore worn