过去分词短语和过去分词从句做状语间的转换
1）If/When(it is) heated,water changes into steam.
2）Though (he was) invited,he did not attend the dinner party.
以上两句怎么转换成过去分词短语做状语啊!
是不是：
1）heated,water changes into steam.
2)invited,he did not attend the dinner party