sb do sth only to discover that

sb do sth only to discover that 用expect that sb will do sth,sb hope to do sth sb ,sb hope th not only like will for sb .To do STH . ( ) sb.to do sth. it takes only sb some time to do sth 和it only takes sb some only to do sth do sb.to do sth. That is easy——sb.to do sth advice sb to do sth与advice sb that ab (should) do command sb to do sth和command that sb should do区别 sb wishes to do sth.sb hope to do sth. invite sb to do sth