Form and rules
How it works
Look, sound, smell, taste and feel as linking verbs take adjective complements: The soup tastes strange.
Like + noun phrase compares an impression; as if/as though + clause gives a fuller comparison.
See/hear/watch/feel + object + base verb can present a complete event; + -ing presents an event in progress or part of it.
Look at, listen to and smell/taste as deliberate actions have different grammar from their linking-verb uses.
Seem/appear can overlap with sense impressions but also allow to-infinitive and that-clause patterns at this level.