Question

初中英语，第一题过去式和过去分词

Answer 1

动词的过去式是一个动词,单独作谓语.不能与助动词、情态动词连用.它的词性与动词的第三人称单数一样.
而动词的过去分词是动词的一种非谓语形式,也叫非限定性动词.不能独立作谓语,只能与助动词一起构成谓语.如：“have/has/had +过去分词”构成完成时态；“be+过去分词”构成被动语态等.它相当于一个形容词或副词,在句中起一个形容词或副词的作用,可作表语、定语、补语等.它的作用与现在分词doing类似.过去分词表的意义是被动或完成.
不过,过去式和过去分词最主要的区别是：过去式是一个动词,而过去分词是一个动词的非谓语形式,相当于一个形容词或副词.

Answer 2

Picked,picked grew, grown found, found
Made,made held, held produced, produced
Discovered,discovered knew, known left, left
Felt,felt thought, thought flew, flown
Avoided,voided realized, realized told, told
Bought,bought were, been heard, heard
Continued,continued explained, explained