A preposition links a noun, pronoun or a phrase with another word in a sentence. The word linked by the preposition is called its object. The preposition usually indicates the temporal, spatial or logical relationship of its object to the rest of the sentence. A single preposition may communicate more than one meaning depending on how it is used. Look at the following examples:
The clock is over the blackboard. (Here ‘over’ communicate the location of the clock)
The bird flew over the tree ( Here ‘over’ communicate the direction of the bird)
When using any prepositions, be sure to maintain the meaning you wish to communicate with the phrase or sentence, and use whatever preposition is appropriate. To be very frank with you, preposition is really a difficult and tricky word which creates much troubles for learners for whom English is a second language. One can acquire some degree of confidence after a lot of practice. There are many good websites dealing exclusively with preposition.
Correction of your sentences
1. do we say:
- she is sitting in this side of the room
-she is sitting on that side of the room?
You can use both but with ‘on’ you have to use ‘that’ instead of ‘this’ . When we speak in this side, it means inside the room. On that side means either far of side, outside or other side of the room.
2. do we say:
- the company pays a high percentage of its net income in dividends
-the company pays a high percentage of its net income as dividends?
Here ‘as’ is more appropriate.
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