I’m is a contraction of I am and can be used interchangeably in all situations. However, a contraction is always considered less formal. When “I am” is followed by a verb, it is usually in the -ing form of the verb.
- I am texting to my friend
- I am eating lunch
- I am waiting for a bus
- I am learning English
- I’m cooking dinner
- I’m looking for my book
- I’m driving the car
When “I am” is followed by an adjective it can be in any form, but the form may change the meaning of the sentence.
- I am sad
- I am bored
- I am satisfied with the book
- I am cold
- I am freezing
- I’m interested in the job
- I’m scared of spiders
- I am fearful of snakes
- I am annoyed
An adjective with a –ing ending is used to describe the characteristic of a person, situation or thing, whilst the adjective with a –ed ending usually describes a feeling or an emotion. Since only people animals have feelings, -ed adjectives cannot be used to describe an object or situation
- I am boring
- I’m interesting
- I am annoying