I was wondering (if): Is this expression only for asking a favor? I was wondering. Did you lock the door? I was wondering if you had locked the door? I was wondering if you could cook dinner by yourself tonight. I’m wondering if you can cook dinner by yourself tonight. Do some of the above sentences sound only like I’m asking a favor? Or do they depend on the situations? Thank you

Different English regional accents: How much do native English speakers understand each other?

British, American, Australian, New Zealand, etc:

Native English speakers would understand each other if they speak with the standard accents.

Then, what about regional differences in one country and/or in different countries such as southern American accents vs. other American accents vs. Northern British accents vs. others?

How much do they understand? Is there a situation where they do not understand at all? or so on.

Thank you

Buying a ticket at a train station Are the followings okay (grammatically plus not very rude or something)? (A?) Ticket to XXX station, please. [Is the "A" always needed?] (To?) XXX station (, please). [Is the "To" always needed?] At a platform, when you want to make sure if the train coming next goes to the station you want to go to, is it okay to say only the station name or should I always say something like "Does the next train go to xxx station"? For example, (To?) XXX station. This/which platform? Right after you received your ticket, is it okay to say only "Which platform?"? Thank you.

Rephrasing: "A column whose diameter is 1 cm" A column whose diameter is 1 cm How can the above expression be rephrased? Any better expression(s)? A column of/with(?) 1 cm in diameter A column of (a? the?) dimeter of 1 cm A column of (a?) 1-cm diameter [A hyphen is needed??] Thank you

By night vs. at night I’ll do something at night. I think this is what I usually hear but I’ve also heard by night. How would one differentiate the two? Thank you

(Did you) forget something? In the title, does omitting the "did you" part also sound natural? As other examples, (Have you) got everything? (Did you) have everything? (Have you/did you) given/give up? (I) gave up, (I have) given up. I often hear (I) got it and (I) forgot, (I will) see you etc. but I am wondering how much this rule(?) is applied to other sentences. Maybe the omitting rule is associated with how commonly those phrases are used? or any other rules? Thank you

Are French people or people in some European countries flexible in schedule?

Let me say "flexible".

Some of my Europien friends all the time change schedules, appointments, etc.

Let's say, seeing my friends at 19:00 often changes to e.g. 20:00 or 21:00.

They often add new other schedules and sometimes they forget about old schedules.

I want to think like "Okay, it happens" and I want to get used to it.

Any comments would be appreciated.

Thank you

Present tense for fixed plans My flight leaves at 10:00. The game starts tomorrow. --> I often hear this kind of expression which uses present tense for fixed future plans/schedules/etc. However, I am wondering if one actually says as follows. - I go to the bar tonight. (Instead of I am going (to go) to the bar, etc). - I play tennis tomorrow. - When do you come back tonight? --- I come back at 7:00. (I've heard "when do you leave" but I somewhat feel that one may not be able to expect the exact time for the "come back" situation. So "When will you + I will" would be common and the example sentences sound a little unnatural?) Thank you

Your country vs. where you are from For example, in the following sentences, "Do you have this in your country?" vs. "Do you have this where you are from?" What I heard was the former sounds cold and the latter is preferred (or specify the country). Otherwise, the person you are asking may think like "It's not my country. You can come if you want" or something like that? Is this true? Thank you