How to spot a Verb

1. TO : to look, to go

2. ING: looking, going

3. ED: looked, went/gone

4. ES: looks, goes

5. MODAL (Can - Could, May - Might, Will - Would, Shall - Should, Must - Ought to): can look, can go

Do, Does, Did, Have, Has, Be (be, am, is, are, was, were)

6. SVO: they look, they go

How to spot a Preposition

https://www.englishclub.com/vocabulary/prepositions/list.php 

How to spot a Conjunction

https://magoosh.com/english-speaking/the-ultimate-english-conjunctions-list/

https://7esl.com/conjunctions-list/