英语:写出下列动词的过去式和过去分词.

问题描述:

英语:写出下列动词的过去式和过去分词.
produce
search
appear
attack
circle
collect
enter
use
offer
suppose

produced
searched
appeared
attacked
circled
collected
enterred
used
offerred
supposed
这些是过去式,过去分词和过去式一样.