Subject Predicate
Traffic is a major cause of pollution.
1.Tom yawned.
Subject + Verb
2.Tom opened the door.
Subject + Verb + Object
3.Tom is ready.
Subject + Verb + Complement
4.Tom lives in China.
Subject + Verb + Adverbial
5.Tom gave me a pen.
Subject + Verb + Object + Object
6.Tom got a shoe wet.
Subject + Verb + Object + Complement
7.Tom put the box on the table.
Subject + Verb + Object + Adverbial

Complex sentence

Main clause Subordinate clause
Hong Kong's air pollution has become worse since industry expanded in the Pearl River Delta.