First conditional

If I have enough money, I will buy some new shoes.

If it rains, I won't go to the park.

If I see her, I'll tell her.

She'll miss the bus if she doesn't leave soon.

If she doesn't leave soon, she will miss the bus.

if

when

as soon as

until

unless (=if not)

before

after

https://www.youtube.com/watch?v=9ifCM8kJFKI&t=4s

https://www.engvid.com/learn-english-grammar-the-first-conditional/

https://www.perfect-english-grammar.com/first-conditional-exercise-1.html

https://agendaweb.org/exercises/verbs/conditional/first-conditional-1

https://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-1/exercises?02

https://speakspeak.com/english-grammar-exercises/intermediate/first-conditional

https://www.learnenglishfeelgood.com/grammar-firstconditional1.html