The Past participle of the verb to forget is ...
forgotten
The Past simple of the verb to cry is...
cried
The Past simple of the verb to eat is...
ate
The Past participle of the verb to wear is
worn
The Past participle of the verb to study is...
studied
The Past simple of the verb to buy is...
bought
The Past simple of the verb to grow is...
grew
The Past participle of the verb to do is...
done
The past participle of the verb to understand is...
understood
The Past participle of the verb to sing is ...
sung
The Past simple of the verb to be is
was/were
The Past simple of the verb to teach is ...
taught
The Past participle of the verb to fly is ...
flown
The Past participle of the verb to think is...
thought
The Past simple of the verb to forgive is...
forgave
The Past simple of the verb to do is...
did