写出下列动词的过去式和过去分词。 1. lend _______ _______ 2. say _______ _______ 3. learn _______ _______ 4. bring _______ _______ 5. buy _______ _______ 6. think _______ _______ 7. speak _______ _______ 8. wear _______ _______ 9. grow _______ _______ 10. drink _______ _______