Question

identify adverb This very useful device will be great addition to any house hold​

Answer 1

$<font color=green>$

$\underline\red{Adverb}$ $\purple{=}$ usefully

• In your sentence there is no adverb .

• To make your sentence adverb then add $\orange{useful~+~ly~=~usefully}$ .

Answer 2

useful is the adverb here .

thx