"Send me the file" is correct English, but it sounds like an order. A few soft words turn it into a request people are happy to say yes to.
Way 1 · best default
The classic polite request. Works with friends, colleagues and strangers.
Examples
Would you mind closing the window? It's freezing.
Would you mind sending me those notes again?
In a conversation
A: Would you mind keeping an eye on my bag?
B: Not at all. Go ahead.
Common mistake
Not: Would you mind to send me the file?
Say: Would you mind sending me the file?
After "would you mind", use the -ing form.
Way 2 · no rush
Add it to the end of a request to show there's no hurry.
Examples
Could you check this when you get a chance?
Send me the photos when you get a chance.
In a conversation
A: Anything else before I go?
B: Just look over my slides when you get a chance.
Way 3 · casual ask
A relaxed, friendly way to ask, without much pressure.
Examples
Any chance you could pick up some milk on the way?
Any chance you could lend me your charger?
In a conversation
A: I'm just leaving work.
B: Any chance you could grab some bread?
Way 4 · extra polite
Very soft, almost indirect. Good for your boss, a teacher or a bigger ask.
Examples
I was wondering if you could look at my CV.
Hi, I was wondering if you could swap shifts with me on Friday.
Common mistake
Not: I was wondering if you can help me.
Say: I was wondering if you could help me.
Keep it in the past: "was wondering" goes with "could", not "can".
Way 5 · big favour
The softest. Shows you know you're asking for something extra.
Examples
If it's not too much trouble, could you drop me at the station?
Could I get a glass of water too, if it's not too much trouble?
Read the moment, then choose the way that fits it best.
Pick one and practise it in a real conversation. Save the ones you want to remember.
