7、分词”构成,原来带to的情态动词变成被动语态后“to”仍要保留。歌诀是:情态动词变动,情态加be加“过分”。例如: wecanrepairthiswatchintwodays.--Thiswatchcanberepairedintwodays. We mustfinishthisworksoon. --Thisworkmustbedonesoon.六、主动语态变被动语态需要注意的几个问题.(1)时态保持一致。Ihaverepairedmycomputer.---Mycomputerhasbeenrepaired