Hi
You can't watch TV round the clock, it's bad for your eyes.
You can't be watching TV round the clock, it's bad for your eyes.
--- Which is better?
The first one is correct. However, in some dialects of English you will hear the second used.
I agree entirely. My Irish grandfather would certainly have used "You can't be watching..."
"You can't be watching..." sounds OK to me.
If you have a question about the English language and would like to ask one of our many English teachers and language experts, please click the button below to let us know: