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perfect tense

Posted: Fri Jan 25, 2013 2:22 pm
by indonesian
what's the difference between these:

1. I had a headache
2. I have been having a headache
3. I have had a headache
4. I had been having headache
5. I had had a headache
6. I'm having a headache
7. I have a headache

correct me if I'm wrong. here are my assumptions:
1. number one implies that I no longer have a headache.
2. number two implies that I'm still having a headache from previously, so what's the difference with number 6 and 7?

I don't really understand the other. thanks

Re: perfect tense

Posted: Sun Feb 10, 2013 1:26 am
by GawDesmond
Hi,
3 and 6 are the correct answers.