Adverb eller adjektiv?

The prince looked happy/happily. happy

He smiled happy/happily. happily

Kate is a good/well player. good

She plays good/well. well

The tiger looked sleepy/sleepily. sleepy

The tiger nodded sleepy/sleepily. sleepily

His movements were slow/slowly. slow

He moved slow/slowly. slowly

Bob is a fast/fastly runner. fast

He runs fast/fastly. fast

Grandma is a slow/slowly driver. slow

She drives slow/slowly. slowly

You are a horrible/horribly liar. horrible

You lie horrible/horribly. horribly

He is a quick/quickly walker. quick

He walks quick/quickly. quickly

This is a really hard/hardly problem. hard

I'll have to work hard/hardly to solve it. hard

Here is an easy/easily problem. easy

You can easy/easily solve it in 10 minutes. easily

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