When do you hyphenate adjectives and when do you use a commando between adjectives.?

Answer 1

You hyphenate them when leaving out the hyphen changes the meaning to one you don't mean.

an Irish-american is not the same as an Irish American

Answer 2

What is a "commando"? In over 60 years of using British English I have never come across a "commando" as a form of punctuation mark.

Answer 3

What's a commando? Maybe you mean comma?

Sometimes you have lots of adjectives that all modify the noun.
The tall old French gentleman is nice.

But sometimes you have modifiers where one modifies another adjective and that adjective modifies the noun. So you can hyphenate the first two. In this example, "man" doesn't modify "boat."
The man-made boat sank immediately.

The boy is five years old. I saw the five-year-old boy.
In this example, "five" doesn't modify "boy." It modifies "year," and "year" modifies "old," not "boy."

Answer 4

Assuming you mean a comma- this gets very tricky. Normally, when you have several adjective describing the same noun, you use commas between them. "He lived in a small, quaint, yellow house." But sometimes you have an adverb that describes the adjective, not the noun. "He lived in a fairly small house." "fairly" modifies "small", not "house", so you don't separate it with a comma.
Hyphens are used sometime when there's a compound noun, or a pair of words bound together. "He was a well-trained commando." "It was a half-ruined house" There's no hard and fast rule about this- it's more based on usage. Look the pair of words up as one term on dictionary.com if you're in doubt.

Answer 5

I've never used a commando in my life.

Answer 6

Examples please.