1."Tomakethecityclean"isanexampleofusinganounastheobjectfollowedbyanadjectivetodescribethestateofthecity.2.Thephrase"makemoney"isacommonexpressionwheretheobjectisanoun,andnoadjectiveisused.3.Thesentencestructure"make+object+adjective"isfrequentlyused,andsometimestheinfinitiveform"tomake"isomitted,asin"tomakethecityclean."