请问:AS+过去分词可以做哪些句子成分?

1\As is agreed,we .例如：As expected,he got back in time.=As was expected,.或As we had expected,he .定语从句前置,省略
2、We issue the draft as it was agreed to you now =We issue the draft as we had agreed to you now .状语,As 如.所要求去做 例如：I 'll do it as told to =I 'll do it as I was told to
希望有助,