At or in?
In is used for position inside large places - countries, districts, large cities etc, and in three-dimensional space (when something is surrounded on all sides.). At is generally used for small and unimportant places like villages, small towns etc.
- He lives at Ottappalam in Kerala. (Ottappalam is a village in Kerala.)
- His brother lives at Mumbai. (Mumbai is a big city.)
- Turn right at the next corner.
- She grew up in Africa.
- Letís go for a walk in the woods.
- He is in the office.
This rule is not very rigidly followed, and in is often used for small places too, though at is seldom used for big places.
Sometimes we use at with a larger place, if we just think of this as a point on a journey or a meeting place, for example.
- The planes stops for an hour at New Delhi.
- Lets meet at the club.
At is particularly common with proper names used for buildings or organizations.
- She works at Legal and General Insurance.
- She works in a big insurance company.
- I first met her at Harrods.
- I first met her in a shop.
As, since, because and for
A lot of, lots of, plenty of, a great deal of
Below and under
Above and over
Both and both of
As if and as though
Fairly, quite, pretty and rather
Finally, at last, in the end and at the end
No and none