'looks like a' versus 'looks as a'

[Sellque]

English Grammar Tests, Elementary Level

ESL/EFL Test #44 "Basic Weather Expressions", question 8

It looks ......... a storm is coming.

(a) as
(b) that
(c) like
(d) of

English Grammar Tests, Elementary Level

ESL/EFL Test #44 "Basic Weather Expressions", answer 8

It looks like a storm is coming.

Correct answer: (c) like

Your answer was: incorrect
It looks as a storm is coming.
_________________________

I WANT TO KNOW WHEN I HAVE TO USE "LIKE " AND WHEN "AS"

THANK YOU
Sellque

[Conchita]

1. Use like + adjective + noun: The witch sounded like an old crow; your idea sounds like a good one.

2. Use like + noun: This piece of music sounds like Mozart; those clouds look like sheep.

3. Use like + clause: It looks like a storm is coming; it smells like something is burning.

4. Use as if or as though + clause: It looks as if it's going to rain; it sounds as though there's a party next door.