Pay attention to the following:

1. The object complement gives more information abut the object. They called the young man Great Hero. 2. An object complement always occurs in this pattern: verb + object + object complement. The object complement can often be a noun phrase or an adjective. They made Yu Tong monitor of their class. You must keep the room clean all the time. 3. Sometimes a to-infinitive or bare infinitive can be an object complement. I’d like all of you to work still harder.