先更正一下lz,没有suggest to do 这种形式,的确,suggest 后面 可以跟to,但to 这时是介词,后面要跟宾语,具体用法是：suggest + 名词/代词+to +人.如：We suggest the plan to him.另外就是suggest doing sth.表示“建议做某事”,如：He suggests going out for a walk.
suggest doing something • I suggest drinking (NOT suggest to drink) something warm. suggest something • She suggested a walk after dinner . I suggest you ring rather than you email her.
