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Hi, Ahmed,

Ahmed Imam Attia posted:

Hello. Are the following two sentences correct or not? If not correct, what's wrong with them? 

- Tarek would not have caught that bus unless he had run very fast.

- Unless you had rung me, I wouldn't have come to see you.

Thank you.

'Unless' means 'except if'. When the 'except if' implication doesn't apply, we use 'if .... not'. That's why, I see that your first sentence is grammatically correct, while the second is NOT.

BTW, both your sentences are related to the third conditional, not the second. (See the title of your thread, please).

Last edited by ahmed_btm

Hi, Hussein,

Hussein Hassan posted:

Can I interrupt for a moment? 

According to OLAD, we can't use  'unless' in the third conditional, i.e. if we know that something hasn't happened or that something is not true, we should use 'if... not' instead. 

What do you think?

I disagree with the first part of your post "We can't use 'unless' in the third conditional', but I completely agree that "We can't use 'unless' for things that we know to be true". In fact, some grammarians are against using 'unless' entirely in the second or the third conditional, but I am not from that school. I see that using 'unless' in the second or the third conditional is grammatically correct, but just seems very complicated. In fact, this takes me to one of my earlier posts here when I had a discussion with Amy about this particular point and this was her reply: 

"I'd say it may well be more common to find 'unless' in a type 1 IF-sentence, but there is certainly is nothing that prevents the use of 'unless' in type 2 or type 3 conditionals."

Type 2: He wouldn't cancel such an important meeting unless he was sick.

Type 3: He wouldn't have fired Jim unless he'd had a very good reason.

I also still remember the following example in an old post:

- I wouldn't eat that food unless I was really hungry. (David and Okaasan assured that it is perfectly fine and very natural to say).

- Marin Hewings in 'Advanced Grammar in Use' says:

"However, we use 'if .....not', but not unless when the 'only if' implication doesn't apply: If it wasn't the best performance of Hamlet I've seen, it was certainly the strangest." And adds:

 

 

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Last edited by ahmed_btm
Ahmed Imam Attia posted:

Hello again. What about the following sentence? I think that it is not correct, right?

- The sea will become polluted unless we stop dumping oil and rubbish into it.

Thank you.

Yes, I agree with you. Although I know that it is mentioned in one of our old exams, I see that it isn't well-written. It is quite clear from its meaning that we do throw rubbish into the sea, so, in my opinion, it should be like this:

- The sea will become more polluted if we don't stop dumping rubbish into it. (Meaning: It is one of the ways to stop its pollution).  

After all, I'm afraid I can't decide which one of the following is correct and which one is not and why.  Please help. Thank you

1- I wouldn't have the first prize unless I trained hard.

2- Unless you had studied hard, you wouldn't have got high marks.

3- Gamila wouldn't have bought the new car unless she had saved money. 

4- I wouldn't have been able to do it unless she had helped me.

5- Unless you had told me about Rasha's new dress, I wouldn't have noticed it.

6- Unless my sister had been born, I wouldn't have had anyone to play with when I was a child.

7- I wouldn't have reached this good level unless she had helped me.

8- Unless he had had money, he wouldn't have moved into a large house.

Thank you.

Ahmed Imam Attia posted:

After all, I'm afraid I can't decide which one of the following is correct and which one is not and why.  Please help. Thank you

1- I wouldn't have the first prize unless I trained hard.

2- Unless you had studied hard, you wouldn't have got high marks.

3- Gamila wouldn't have bought the new car unless she had saved money. 

4- I wouldn't have been able to do it unless she had helped me.

5- Unless you had told me about Rasha's new dress, I wouldn't have noticed it.

6- Unless my sister had been born, I wouldn't have had anyone to play with when I was a child.

7- I wouldn't have reached this good level unless she had helped me.

8- Unless he had had money, he wouldn't have moved into a large house.

Thank you.

See the answer to these questions here:

https://thegrammarexchange.inf...1#622256385764267831

Last edited by ahmed_btm

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