Answer :
Here's the breakdown for the bolded adverbs:
The class sat quietly.
How (It describes how the class sat.)
We looked everywhere.
Where (It indicates the locations where you looked.)
Many people arrived late.
When (It indicates the time of arrival.)
You seem very happy.
To what extent (It describes the intensity or degree of happiness.)
I waited patiently.
How (It describes the manner of waiting.)
The children laughed happily.
How (It describes the manner of laughter.)
He is always helpful.
When (It indicates the frequency of his helpfulness.)
The package arrived yesterday.
When (It indicates the time of arrival.)
I walked home slowly.
How (It describes the manner of walking.)
Stay here until I call you.
Where (It indicates the location to stay.)
Now, let's create sentences with adverbs for each type:
How:
She sang beautifully during the recital.
When:
The team will meet tomorrow for practice.
Where:
He searched under the couch for his missing keys.
To what extent:
The soup was extremely hot when served