English for Today by Ganiu Abisoye Bamgbose (Dr GAB)
COLOURS IN GRAMMAR
She phoned me out of the blues (nonstandard).
She phoned me out of the blue (standard). To do something without warning is to do such thing out of the blue.
She passed her exam in flying colour (nonstandard).
She passed her exam with flying colour (nonstandard).
She passed her exam with flying colours (standard).
No one knew he was a green snake under the green grass (nonstandard).
No one knew he was a snake in the grass (standard).
GAB