Among other differences, I'm is informal, and it's more common in speech than writing regardless of formality. Plus "I am" can stand alone as a two-word reply to a question (from someone asking whether you're a native speaker or not, for example). But you definitely can't simply reply "I'm" in such a context. –

2015年4月26日 · 'I'm' is always used in conjunction with a noun phrase. You cannot write "A boy, I'm", but you can write "A boy, I am". 'I'm' may also be considered informal outside speech or a literary scope. 'I am' is also longer to pronounce, and therefore has more emphasis (as pointed out by one of the answers).

I'm going straight home after work. How about you? I'm going straight home after work, which I assume you are also doing, would you like to accompany me as far as it is possible to travel together? Or, can I give you a lift? I'm going straight home after work. What about you? I am going straight home after work.

I'm 55 — is that old? Got a good vocabulary from reading, maybe a bit sheltered as far as "the vernacular of the peasantry" (a line of the Wizard of Oz' no-doubt self-professed Professor Marvel, aka the wizard).

Surprise implies a deviance from expectation. So, when someone says, "I'm surprised you did 'x' positive thing," they implicitly say, "I expected something slightly worse from you!" Because of this, I try to avoid this phrase all together since its more of a backhanded comment. Conversely, when used to express disapproval, it's obviously negative.

"I'm at the bottom of town now, but I am heading to the top of town."... then my friend would probably infer that he should meet me in a pub at the top of town. If I instead said: "I'm at the bottom of town now, but I am heading for the top of town."... then my friend is more likely to infer that he should meet me in some pub along that route.

When someone asks whether you have completed a task e.g. shopping, dinner. What should be your answer? I am done. or I have done. To me, the former sentence's formation, Sub + VBe+ Past

There are a few questions about past vs. passed, but it seems to me that this is very much a subtle matter, where small changes can change the answer, so here is yet another one.

2013年11月1日 · I'm not writing you because I'm short on money. I just want to tell you all about Stanford in the summer, and also to thank you for that swell Christmas present. Sorry I haven't written sooner. There was a peachy keen all-campus dance Saturday night. All the boys and a few girls were there. I danced with one cute trick. First name was Aphrodite.

I'm reading an English text about politics, and in one paragraph I found "voters," "electorates" and "constituents." Now I would like to know if they are absolutely the same, or if they have slightly different meanings. Here is the whole paragraph: Any help is appreciated