係 前面 不是後面
sell( present) sold ( past) sold( past participle)過去分詞
clear( present) cleared( past) cleared( past participle)過去分詞
eat( present) ate( past) eaten( past participle)
Examples:
1) He sold all the flowers.
I don't understand your first question about flower, table, cake 後面???
Answers for your second question:
sell - sold - sold
clear - cleared - cleared
eat - ate - eaten