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Hi there,

Here is a letter which I was given to check. I've spotted several mistakes (I've marked them with numbers) but I'm not sure whether I'm right and whether there are more. Could you please have a look at it ?

Dear Sara,

How are you? I'm sorry I haven't written for so long (1)because I (2)hadn't got time. (3)Whole last month I (4)was learning for my driving test which (5)I have on next Friday.

I'm writting to you because unfortunetly I brought one of your (6)pullover (7)with me to my home. I (8)must packed it with my clothes. It's (9)blue pullover with white sleeves and a white (10)writing on the back.

Could you check if you have my favourite blue pullover, maybe you (11)take it to Denmark. It was (12)very similar one but my haven't got white writing on the back. If you found it would you sent it to me and I will send you (13)yours pullover.

1. is "becasue" ok here ?
2. is the usage of past perfect necessary here ?
3. hmm... I don't think that "whole last month" is ok... shouldn't it be like "For the whole last month" ?
4. is past continuous necessary here ? is it ok ?
5. "I'm having" instead of "I have" ? Because it's planned ?
6. pulloverS ?
7. hmm... "to my home with me" ? any option doesn't sound right...
8. shouldn't there be "I must have packed..." ?
9. /A/ blue pullover
10. is it ok to say "a white writing on the back" ?
11. you TOOK it... or you have taken - which one ?
12. /A/ very similiar one
13. your

Please, comment on the mistakes I've noticed. Tell me if any of them are ok or not and why. And the last thing, are there any more mistakes in this text ?

Thank you so much!