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Could you help me with this please?

1 I can control my tics better if I'm in this position than if I'm in that position.
2 I wish there was a device you could point at people and you'd know what nationality they were from.
3 What shoes size are you/What size shoe are you.
4 Her house is closer to mine than yours (is) (does the IS change the meaning?)
5 Open the window wide and make less noise.
6 He trusts me more than you./more than you do. (what's the difference?)

thank you
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1) okay. (Or you could omit "if I'm" both times.)
2) I wish there were a device you could point at people and you'd know their nationality/know where they were from. ("Was" is also quite common, though not really correct after "I wish.")

3) What's your shoe size? or -- What size shoe do you wear?
4)"Her house is closer to mine than yours" is ambiguous. Choose either "Her house is closer to mine than to yours" or "Her house is closer to mine than yours is."
5) Okay (although I don't really understand why these two things are mentioned together.)
6) "He trusts me more than you" is ambiguous. Choose either "He trusts me more than he trusts you" or "He trusts me more than you do."

I'm just curious -- may I ask where you get all these sets of sentences you ask about? Are they from your own writings or conversations, or from things you've read, or from some sort of grammar exercises?

Is (1) about Tourette's?
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2 I wish there was were a device you could point at people and you'd know what nationality they were from.

nationality they were from. Present tense because where you are from is in the present even though it refers to an event in the past. Should be, what nationality they are, or where they are from. Both at once does not work well because nationality relates (mainly) to the person, not where they are from.
Hello Khoff,

How are you?

I had one question:

You said you can say

What size shoes do you wear?

How would you say

What color eyes do you have?
What color are your eyes?

Are they both natural in American English? Which would an American say?

Thank you
alc24What color eyes do you have?
What color are your eyes?
These are both fine.
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