I’m is a contraction for I am. The apostrophe indicates that one or more letters have been left out. So I’m means I am.
But the two constructions are not interchangeable. You can always replace I’m with I am, but the reverse is not true. There are rules about when the contraction is allowable. You can say “I’m taller than you are.” You cannot say “You’re taller than I’m.”
The verb to be is the only verb in English which has a different form in the first person singular, present tense:
I am; he/she/it is; we/you/they are.
So am is just the first person singular of the verb to be in the present tense.
In English, we always use subject pronouns. This means that the form am is never used without the pronoun I so we always say I am, or in questions where it is inverted, am I .
In speech, I am is usually contracted to I’m.
I’m just means I am and it is used when we speak, and when we quote speech. We also use it in informal emails, text messages etc.
Well, “who am I” is a question that could be answered with anything from your name, to a long explanation of your traits as a person, your values, your hope and dreams — essentially anything that describes or defines you as a person.
“How am I” is generally answered with information about how you are currently feeling, your current well-being, and the like.
They are usually interchangeable. As mentioned already, using “I’m” sounds more natural. In formal writing, it is preferable to use “I am”, but in everyday conversation, it would sound weird to use “I am” every time. However, keep in mind that there are some unwritten rules on the usage of “I’m”. Generally, it should only be used at the beginning of a phrase. In the following example, you are technically allowed to use “I am”, but you would sound overly formal and stiff if you did.
“I’m going to the store.”
“My girlfriend is happy that I’m taller than her.”
On the other hand, it would sound very strange to use it at the end of a sentence. In the following example, no native speaker would ever really use “I’m”.
“My best friend is smarter than I’m.”
The sentence should be said,
“My best friend is smarter than I am.”
Another thing to point out is that if “I am” is ever used as it’s own sentence, it would not be abbreviated either. For example, if someone asked “Who here is going to the party tonight?”, you would answer,
The rules on this are not set in stone, but over time, listening to conversations, you will develop an intuitive sense of what sounds right and what doesn’t.
“I’m” is contraction of “I am”.
So there’s per se no difference between them.
But if you only have “am” with nothing in front or after, then it doesn’t make grammatical sense. You can’t just say “am great”.
But saying “I am great” or “I’m great” are the same.
“I’m” is somewhat informal, and “I am” should be used in highly formal writing. But in an email between colleagues, for example, it’s usually fine to write “I’m”.
Please give an example; I’m not sure what you mean. In informal writing, such as texts, you might write “Am almost there, c u in 5” to say “I’m almost there. I’ll see you in five minutes.” But in more formal writing, from a friendly note to a business report, you need both the subject (“I”) and the verb (“am”).
I’m is a contraction of I am.
You’d use it in a situation where you’re describing your own personal state. It’s equivalents are:
You are – You’re – (pronounced the same, but not to be confused with ‘your’ (‘belonging to you’), this is probably one of the most common spelling mistakes that native English speakers will make)
We are – We’re
They are – They’re – (pronounced the same, but not to be confused with ‘their’ (‘belonging to them’) and ‘there’ (‘that place / position’). This is probably the SECOND most common spelling mistake native English speakers will make!)
He is – He’s
She is – She’s
It is – It’s
For some reason we don’t contract past tense: I was. Honestly, I don’t know why this is. I have even just looked it up to see if there is a reason, but there doesn’t seem to be one.
But we do contract future tenses:
I will – I’ll
We will – We’ll
They will – They’ll
He will – He’ll
She will – She’ll
It will – It’ll
In any sentence, “I am” is correct and “I’m” is also correct, because it is the shortened form of “I am”.
Lazy speech is rampant now. English speakers try to shorten everything they say. Have you noticed all the acronyms in the average document? Time was when, in any document, the full word would be written after the first use of a particular acronym like this: RSPCA (Royal Society for the Prevention of Cruelty to Animals). Then the acronym would be used for the rest of the document — to save time, effort, ink and paper, presumably.
Now, in many documents, particularly on the Internet, you are expected to know what the acronym stands for. That is hardly friendly to the average reader. There are so many new things produced for which people use acronyms that it is hard to keep up.
Also perfectly good words are shamelessly shortened. How lazy can one get when one is too tired to say the rest of a word? Some examples of shortened words are taken from the website that appears above the examples:
an Australian Aborigine, Aboriginal, koori
abdominal or stomach muscles
administrator, administration, person or department that runs an organisation
How lazy can one get? It must mystify foreigners trying to learn English.
I do this, too. I’m amazed that someone else deals with this!
Usually what happens for me is that I’ll be reading a book and come across a new word. If it can be understood in context or by breaking it down, I move on.
The problem is when I encounter a new word that doesn’t make sense in a traditional way. Lugubrious is a good example.
I’ll hold the word in a space in my brain and kind of niggle and pick at it and try to understand what it means and why it means that.
After a week or two, I usually break down and look it up.
These are the words that stick with me forever. Once I’ve gotten it stuck and thrown a bunch of mental energy at it, it’s mine.
This might not be what you mean, but it’s my experience.