Tick the correct sentence in each pair.

1 a) Global weather patterns have changed for many gears.
   b) Global weather patterns have been changing for many years.
2 a) I'd stayed at a hotel for six months when I bought my house.
   b) I'd been staying at a hotel for six months when I bought my house.

We use the simple aspect of tenses for actions which we think are:
●  finished: I've done my homework. (the homework is finished)
● Permanent: I've lived in England for 10 years. I've worked for this company for most of that time. (I think I will remain in England and continue to work for the same company)

We use the continuous aspect of tenses for actions which we think are:
●  unfinished or in progress: I've been doing my homework. (it isn't finished yet)
● Temporary: I've been living in England for six months. I've been working as an au pair: (1 think I will leave England one day - my job is temporary)

We use past perfect tenses to connect two past actions, and past perfect continuous when one event interrupts another:
I'd been waiting for twenty minutes when the bus arrived.
� the simple or continuous aspect applies across the entire tense system.

Answer key:
1. b
2. b

2) Rewrite these positive sentences in the negative form.

1)  I .............. (live) here all my life and never want to leave.
2)  I .............. (attend) a beginner's class in Spanish for six weeks.
3)  We .............. (drive) for hours when we spotted the hotel.
4)  I .............. (take) the train for a long time. I prefer to drive.
5)  Mr Georgiou .............. (Work) for the company for twenty years when he retired.
6)  The city I grew up in .............. (Changed) so much, I hardly recognize it any more.
7)  I .............. (Work) in an office for the past month, but my profession is acting.
8)  She .............. (always I take) good care of her finances.

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