Yeah scruffy to me always means a man who hasn't shaved. It's related to hair. I can give you two real world examples. Someone told me last week, that I look better "without that scruff on your face" and then somebody a few days ago said they "liked my scruff." In both cases they were referring to facial hair. When people look like they've just rolled out of bed we say they are looking "rough". Like "Steve is looking rough today." or we might say they are "a hot mess." The woman looks very neat. If you asked me to point out the scruffy one, I would say it's the man. Look at his scruffy beard. For the woman you could say she is dressed or looks comfy or casual.

1. I'm not sure what is your meaning 2. My meaning: ......... 1. What do you mean? 2. I mean,......

You would normally say "can you look into this for me" or "can you look into this?" People also say "check this out" but it usually means going to see something for the first time, not a verification of a previous notion (a double check). I am going to check out the new store around the corner, I hear they have great coffee. They say the print shop down the street is cheaper, so I am going to check this out on my break and we can decide on whether we should print there or not, after lunch. If you read something and you want to make sure it is true, you can ask someone to "double check" it. Can you double check this? A Cross check is an illegal check in ice hockey. I know it can also mean to verify by a different method, but in Canada, the first thing one might think of is this: https://www.youtube.com/watch?v=LKIKf7PXjnQ . So, one is for initial viewing, double check is for re-confirming, and cross check is to reinforce with an additional method of verification. So, I can go online to check out the prices, double check by having Steve go online, and cross check by calling the store and asking what their prices are.

It means "stop doing something" but directed at someone else. If someone keeps playing loud music, you can ask them to "knock it off." I hope that example helps.

Could you please provide your contact information, so that we can schedule an appropriate date for an interview? A more natural, less formal way? Can you give me your contact info, so that we can set up an interview sometime next week? What is your contact info? I want to set up an interview with you next week. Would you mind writing down your contact info? I want to set up a time to meet with you for an interview. It depends on what you are trying to say.

I would caution you to continue to use FOR as it is correct, but I will explain why sometimes you will hear people omit it in your example. The reason is because it's a convention of spoken english. How long have you been waiting for? Answer: 10 minutes. You don't have to answer with the FULL sentence of "I have been waiting for 10 minutes." In the same way they drop the FOR. "How long have you been waiting?" "I have been waiting 10 minutes". It is similar to how people say "wanna" instead of want to. The problem here is that certain quantified time expressions REQUIRE for, such as "I have been studying English FOR 4 years." In summation, for is a cornerstone of perfect continuous tenses and should not be omitted, however, you will hear people do that, especially in discussions about how long they have been WAITING for something, but not with other verbs. I have been fishing 10 minutes. Uh, sounds weird. I have been cooking 2 hours. It doesn't sound right, it should be "cooking for 2 hours, fishing for 10 minutes", but for some reason people omit it with waiting. So just keep using for as you did in the first example and everything should be fine.

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If you say "someone is proud of his work" that makes sense. Their is used by people as a replacement for him/her when the gender is not known. It depends what side of the grammatical debate you fall on. Old school traditionalists argue that words like someone, everybody, a person should always have his or her used with them as they are singular pronouns. "Anyone wishing to buy beer should have his or her identification ready." They are not wrong. Alternatively people do say "Could the owner of a blue Toyota please make their way to the parking lot?" It could be "Could the owner of a blue Toyota please make his or her way to the parking lot?" FACEBOOK uses Their in place of he or she when the gender is not known. It is Sarah's birthday wish them a happy birthday, It's Frank's Birthday write on their wall. So and so updated their status. Basically his or her and ITS have been replaced with THEIR so often in this case that it has become accepted. You can;t USE IT, because the phrase says Some ONE, so we know it's an entity and not an inanimate object "someTHING could be proud of its work."