use的过去式和过去分词

问题描述:

use的过去式和过去分词
这些词的那?plant
produce
plan
invite
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Dalian produces big ships.
Famers harvest rice in autumn.
这两句变被动语态

plant planted planted
produce produced produced
plan planned planned
invite invited invited
Big ships were produced in Dalian.
Rice is harvested by farmers in autumn.