按要求写单词。 1. eat (过去式) ____________ 4. buy (过去式) ____________ 7. invited (动词原形) __________ 2. write (过去式) ____________ 5. brought (动词原形) ____________ 8. get (现在分词) ____________ 3. find (过去式) ____________ 6. came (动词原形) ____________ 9. give (现在分词) ____________