Rules of Prepositions

1. A preposition must have an object All prepositions have objects. If a “preposition” does not have an object it is not a preposition. it’s probably an adverb. A preposition always has an object. An adverb never has an object. examples: They are in the kitchen. (preposition in has object the kitchen) Please come in. (adverb in has no object; it qualifies come) 2. A preposition cannot be followed by a verb Verb placed immediately after preposition must be in gerund form. Here are some examples: He prevented me from drinking cold water. He insist on trying again. 3. Usage of “in” and “into” When you want to express motion toward something, use “into” rather than “in.” Reserve “in” for moments when you want to indicate a location. examples: I swam in the lake. (Indicating location) I walked into the pub. (Expressing motion 4. Be careful on where you place the preposition A preposition generally, but not always, goes before its noun or pronoun. One of the undying myths of English grammar is that you may not end a sentence with a preposition. Do not use extra prepositions when the meaning is clear without them. In other words, use the preposition if needs to be there, and if it wasn’t, the meaning of the sentence would change. Correct: That is something I cannot agree with Incorrect: Where did you get this at? Choose a correct preposition in the sentence. 1)I want to lose 5 kilogram (on, at, in) one month. 2)Could you get me this pants (on, at, in) a larger size? 3)She seems to be interested (on, at, in) Psychology. 4)I will come to pick you up (on, at, in) 2 pm tomorrow. 5)This class will be held (on, at, in) Mondays.