1. The fundamentals of English grammar
The way to

2. ? + - Well,... Ok,... No problem,... No, I'm afraid I can't.
Asking the way
how I can get the Post Office
how to get the Post Office
the way to the Post Office 
where the Post office is
Excuse me, could you tell me   ?
Answers + -
Well,...
Ok,...
No problem,...
No, I'm afraid I can't.
I'm afraid I don't know.

3. at the corner of the street at the traffic lights at the crossroads
Directions
 up/down
along
straight ahead
around
through
across
opposite
next to/near
at the end of the street
at the corner of the street
at the traffic lights
at the crossroads
Turn left
Turn right
Take the second street on the left
Take the first street on the right
I’m lost
rush hour

4. About time
How long does it take me to get to the Post office?
It takes you about half an hour to get there.
Present
Simple
How long will it take me to get to the Post office?
It will take you about half an hour to get there.
Past
Simple
How long did it take you to get to the Post office?
It took me about half an hour to get there.
Future
Simple