Days

[jack]

If these are not correct, why? What do they mean?

1. Seven days makes a week. (If this is correct, why? 'Seven days' as one whole thing?)
2. Seven days make a week. (What does this one mean compared to #1?)

What about these ones:
3. These seven days make a week.
4. These seven days makes a week.
5. This seven days makes a week.
6. This seven days make a week.

Thanks.

[Casiopea]

1. Seven days [it (a week)] makes a week. (it; singular) See 4. and 5.
2. Seven days [together they] make a week. (they; plural) See 3. and 6.


5. and 6. are awkward.

[blacknomi]

Cass! I think #2 is unnatural. How would you explain this one?

1- Ten minutes is short.
2- Ten minutes are short.

[Casiopea]

Cass! I think [Jack's 2.] is unnatural. How would you explain this one?

1- Ten minutes is short.
2- Ten minutes are short.

The first one is singular, and the second one is plural. Or have I misunderstood your question.

[blacknomi]

Would you use the plural form?

[Casiopea]

Would you use the plural form?

Yup.

Seven days make a week, and sixty minutes make an hour.

[blacknomi]

Would you think ten minutes a whole concept? So it doesn't make sense if I say ten minutes "are" short.