Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

Possible Duplicate: When do I use 'I' instead of 'me?' A friend of mine asked me for advice about an e-mail he was writing. There was a sentence like this: I and my partners we are interested in investing in your product. I figured it was wrong, so I suggested: I and my partners are interested in investing in your product. This looks grammatical to me but sounds strange. Also, I have seen a lot of people writing this: Me and my partners we are interested in investing in your product. which I believe is not grammatical. So, which one of the options above is correct? Also, what would be a better choice of words?.
'I and someone are interested' is grammatically correct. It is the convention in English that when you list several people including yourself, you put yourself last, so you really should say 'Someone and I are interested.' 'Someone and I' is the subject of the sentence, so you should use the subjective case 'I' rather than the objective 'me'. 'Someone and I' clearly means two people, so you should use 'are' and not 'is'. If it was 'Someone or I ...' then you would use 'is', because only one person is interested, either 'someone' or 'I'. It is not uncommon to hear people say 'Me and someone are ...', but this is wrong because it's the wrong case. When an educated person hears 'Me and Billy is going to the ball game', he immediately thinks this is either a child or a very uneducated person speaking. 'I and someone we ...' is incorrect because it is redundant. 'We' is simply another way of saying 'I and someone'. It adds no new information to the sentence, and so there is no reason to include it. You can't just string together alternative ways of expressing the same idea: If you really need it for clarity or emphasis, you have to surround it with some additional words, like a 'that is', or sometimes just punctuation that show its purpose in the sentence. You could say, 'We, that is, Bob and I, are interested ...' All that said, 'I and someone' or 'Someone and I' sounds strange to me, and I suspect most English speakers, because it is an unusual use of the word 'someone'. When 'someone' is used in a list with identifiers of other people, we usually say 'someone else'. Like, 'Bob and someone else are interested ...' rather than 'Bob and someone are interested ...' (I have no idea why this is so; it's just the convention.) 'Someone' without 'else' is normally only used when it's the only person: 'Someone is interesteed ...'

You won't catch the train if you don't leave in time You won't catch the train if you won't leave in time I'm pretty sure the correct version is 'You won't catch the train if you don't leave in time', but I'm trying to explain it to someone and I don't know how to explain it. I also don't know how to google it. Can you please help me with a simple explanation or a link that explains it?.
As implied in the comments, the specific meaning of the two are slightly different (albeit both grammatically correct). It helps to break down the contractions. You will not catch the train if you do not leave on time This phrase is neutral in its blame: not catching the train will happen if you, for whatever reason, do not leave on time. You will not catch the train if you will not leave on time This places blame more directly on addressee: 'will not' implies that the addressee plays a causal role in themselves being late for the train, as if they refuse to leave at the correct time.

I was googling the reason for why it's called 'shotgun' to ride beside the driver when it suddenly hit me - why on Earth is the firearm called 'shotgun'?! Is there any other kind of a gun than one used for shooting?! Why is it called 'shotgun' instead of just a 'gun' or a more technical term (9-gauge, barrel gun etc.)?.

The 'shot' in shotgun refers to the ammunition that the gun fires. Whereas a pistol or rifle fires bullets (single metal balls), a shotgun fires a shell packed with shot (hundreds of tiny metal balls).

