When do we use WHEN + GERUND ?

Question

is it wrong to use expressions like When, Every Time etc + verb- ing?

i've never been taught that at English school? Is it just slang or does it have a meaning?

Answer 1

It's not slang. Here is an example for you:

When walking the dog, one should not run.;-)

Answer 2

Here are few examples on usage:

1)

>>When learning to swim, always wear a good pair of goggles.

>>When sleeping always ensure there is good ventilation in the room.

>>When he is writing something, his lips will twitch a little.

>>When the car is moving too fast, there is a strange sound.

2)

>>Every time he swims, he will go for long distances.

>>Every time we meet, we will have a fruit party.

>>Every time she sang, everyone would paid great attention.

Hope these examples clarify your doubts.   :-))

Answer 3

When coughing, one should cover his/ her mouth.

When driving, one should always pay attention to other drivers.

it's not slang at all

you can tell it's correct when you can put it anywhere else in the sentence and it still makes sense.

ex. WHEN COUGHING, one should cover his/her mouth.

      One should cover his/her mouth WHEN COUGHING.