Some adverbs are used with adjectives and other adverbs. Examples in this lesson are called "intensifiers." Intensifiers provide greater depth of meaning for the words they describe.
Some common intensifiers are somewhat, surely, highly, certainly, very, really, extremely, quite, such, extraordinarily, and tremendously. There are others, but these are a good start if you are new to using them.
This is an extremely unusual bike.
The word "extremely" is an intensifier for the adjective "unusual."
I highly recommend the bakery we used for Heidi’s birthday cake. They did a great job.
That’s quite an unusual color for a house.
Click here for a video that explains how to use "quite."
We surely got a lot of snow last night.
We sure got a lot of snow last night.
(A lot of people in the U.S. use "sure" instead of "surely.")
Setting a mousetrap with cheese is an extraordinarily good way to catch a mouse.