This English grammar lesson will help you understand when to add a hyphen when using adjectives.
After watching the video do the exercises: https://garyskyner.com/tests-exercise...
If you need more help then read the text below before trying the exercises.
When a number is an adjective there is no -s.
A 1,500-metre-high walkway.
A four-man walking team.
A five-minute queue.
(We add hyphens to multiple word adjectives that go before the noun)
A five-minute queue. (Queue is the noun,...)
A five-minute queue. (... five-minute is the multiple word adjective that describes it)
A one-man photography team.
It is a 25-window walkway. (When the adjective comes after the noun...)
The walkway has 25 windows. (... we use an -s if it is more than one, but no hyphens)
Remember: When a number is an adjective no -s.
Now do the exercises: https://garyskyner.com/tests-exercise...
For more help with adjectives: https://garyskyner.com/kb-tag/adjecti...
For more help with numbers: https://garyskyner.com/kb-tag/numbers/