20 questions
The past form of the verb "buy" is ...
The past form of the verb "come" is ...
The past form of the verb "cook" is ...
The past form of the verb "do" is ...
The past form of the verb "go" is ...
The past form of the verb "have" is ...
The past form of the verb "play" is ...
The past form of the verb "sing" is ...
The past form of the verb "teach" is ...
The past form of the verb "want" is ...
The past form of the verb "write" is ...
The past form of the verb "win" is ...
The past form of the verb "drink" is ...
The past form of the verb "eat" is ...
The past form of the verb "make" is ...
The past form of the verb "read" is ...
The past form of the verb "say" is ...
The past form of the verb "sell" is ...
The past form of the verb "open" is ...
The past form of the verb "be" is ...
wash - where
was - were
there is - There are
been