Your skill in identifying the object of a sentence depends on your skill in identifying verbs and prepositional phrases. You might want to review those concepts before you start this chapter. In any case, note that some sentences will have one or more objects; other sentences will not have an object.

If there is an object after a verb or after a preposition, it will answer who? or what?
        Example: Tourists like Toronto. (Object of the verb like)
In my opinion, the system is unfair. (Object of the preposition in)