Bob wants to go to the mall today. Which word is the preposition in this sentence?

The word to is the preposition. Now, how did we know that?

  A preposition can also be determined by the way it is used. The sentence read " Bob wants to go to the mall." The part "to the mall" you knowtest, has the preposition to in it ,right! What we see is a phrase. A phrase is a group of words. "to the mall" is a group of words as you can see. This is called a prepositional phrase, why, because it starts with what- the preposition to. Therefore, we can often tell a preposition by recognizing this kind of phrase, so let's example a prepositional phrase more closely. " To" is a preposition, "The mall" is a noun. When you take a preposition and add a noun or pronoun after it you will make a prepositional phrase. Let's see………. Take the preposition in, let's add the noun the shop, now we have in the shop. Is that a prepositional phrase . Does it start with a preposition and has a noun after it. In the shop………. Yes it is a prepositional phrase, it has what it needs to have in it.