the/in/for +the last/past month? What are these difference? Thank you
In the last six months
For the last six months

In the past six months
For the past six months

last month
past month

(include today or not?) Is it a period? past or not?

Thank you

Question

the/in/for +the last/past month? What are these difference? Thank you
In the last six months
For the last six months

In the past six months
For the past six months

last month
past month

(include today or not?) Is it a period? past or not?

Thank you

Answer

1 - In the last six months I have been to London 3 times.  (things I have done during this period of time)
2 - For the last six months I have been learning a new language (things I have been doing over this period of time

3 - In the past six months - (same as no. 1)
4 - For the past six months - (same as no. 2)

5 - last month (finished time period)
6 - past month (period of time - up to now)

(include today or not?) - For 1,2,3,4,6: yes: up to the moment of speaking/ writing - up to the present moment... No. 5 is finished past time - not including today.

Is it a period? - Yes - 6 months/ 1 month in your examples.
past or not? - All of your examples refer to the past.

I hope that answers your questions...

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