Bonjour à tous,
I have been looking at expressions such as:
Je sais nager - I know how to swim
Je sais conduire - I know how to drive
and so on.
On the other hand, I have come across expressions such as:
Je sais comment m'y rendre - I know how to get there
It's certainly incorrect to say "je sais comment nager", but why is that "comment" is sometimes used with savoir? In other words, what is the place of the formation "savoir comment + verb"?
Thanks in advance for your help.

I have been looking at expressions such as:
Je sais nager - I know how to swim
Je sais conduire - I know how to drive
and so on.
On the other hand, I have come across expressions such as:
Je sais comment m'y rendre - I know how to get there
It's certainly incorrect to say "je sais comment nager", but why is that "comment" is sometimes used with savoir? In other words, what is the place of the formation "savoir comment + verb"?
Thanks in advance for your help.