[Grammar] I've sold a car since a month ago

[kadioguy]

a. I've sold the car since a month ago.:tick:
b. I've sold the car for a month.:cross:
c. I've sold a car since a month ago.:tick:
d. I've sold a car for a month.:cross:

e. I've written a letter since lunchtime. :tick:
f. I've written a letter for an hour.:tick:
g. I've written six letters since lunchtime.:tick:
h. I've written six letters for an hour.:tick:

i. I've read this book since an hour ago.:tick:
j. I've read this book for an hour.:tick:
k. I've been reading this book since an hour ago.:tick:
l. I've been reading this book for an hour.:tick:
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Am I right?

 

[GoesStation]

This post has too many questions, but I will point out that you should write an hour. The H is silent.

 

[tedmc]

I think f, h and j are not correct for the same reason as b and c.

 

[kadioguy]

I think f, h and j are not correct for the same reason as b and c.

But I think (f), (h) and (j) are correct.

'I've written a letter for an hour.' is almost equal to 'I've been writing a letter for an hour.'
'I've written six letters for an hour.' is almost equal to 'I've been writing six letters for an hour.'
'I've read this book for an hour.' is almost equal to 'I've been reading this book for an hour.'

 

[kadioguy]

They aren't.

If you don't mind, could you tell me more?

 

[bhaisahab]

The only ones I find both correct and natural are e., g., and l.

 

[kadioguy]

The only ones I find both correct and natural are e., g., and l.

Could you tell me which ones are correct but unnatural? (Because I am trying to learn more.)

 

[kadioguy]

There are too many incorrect/unnatural sentences there to deal with in one thread.

I suggest you start a fresh thread with one of those sentences and ask for comments. When that has been dealt with, move on to another sentence.

OK, I will do it.
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(update)

I have posted it on https://www.usingenglish.com/forum/threads/258774-I-ve-sold-the-car-since-a-month-ago-(new)