Irregular Verbs: ought/aught

to buy [past tense]
bought
I think I bought too many plants. I hope they all fit in my car!
to bring [past tense]
brought
Well, that ball is lost. Good thing I brought a spare!
to catch [past tense]
caught
On our walk we saw a bird that caught an entire crab in its beak!
to fight [past tense]
fought
A jackal and three vultures fought for their next meal!
to seek [past tense]
sought
The elephant sought a cool place to soak and relax.
to teach [past tense]
taught
Today our teacher taught us about irregular verbs!
to think [past tense]
thought
I always thought Napoleon was really short, but he was taller than the average man of his time!