unless... don't

[zhonglc_2016]

Hello all,

1. You will get a good grade in the course unless you don't do your homework.

This sentence comes from a Chinese grammar book.
I think it is nonsensical or I am wrong. Is it correct?

2. You will get a good grade in the course unless you do your homework carefully.
3. You will get a good grade in the course unless you don't play computer games.

2&3 are by myself. What do you think of them?


Many many thanks.

[Britta]

Well, the sense of the sentence is debatable since a good grade depends on more than just doing your homework. From the grammar point of view it is fine, though.

You will get a good grade in the course unless (=except if) you don't do your homework.
or, in other words
You will get a good grade in the course if you (always) do your homework.

I think you're confusing "unless" with "not - unless":

You will not get a good grade in the course unless you do your homework.

Interesting side remark: this sentence makes much more sense. It says, homework is required for good grades, whereas the original sentence says, homework is the only requirement for good grades.

[admin]

Britta's suggestion there is spot on:
>You will not get a good grade in the course unless you do your homework.

1. You will get a good grade in the course unless you don't if you do your homework.

This sentence comes from a Chinese grammar book.
I think it is nonsensical or I am wrong. Is it correct?
It is nonsensical

2. You will get a good grade in the course unless if you do your homework carefully.
3. You will get a good grade in the course unless if you don't play computer games.

[zhonglc_2016]

Got it. Thank you both. 

[admin]

But also:

1. You will won't get a good grade in the course unless you don't if you do your homework.
2. You will won't get a good grade in the course unless if you do your homework carefully.
3. You will won't get a good grade in the course unless if you don't play computer games.

[Britta]

You won't get a good grade in the course unless you don't play computer games.

I don't buy that one. Pure propaganda. 

[admin]