*Could1.
1.The past of can
A : Did you go The Weekndcocnert yesterday?
B : No, I couldn't go there yesterday because I had a cold.
C : Oh, That's too bad, Are you fine now?
2.Not realistic, exaggerate
A : How many burgers can you eat?
B : I think, I could eat hamburgers forever.
A : So do I, Why don't we eat hamburger outside?
3.Make suggestions
A : What are you going to eat for lunch today?
B : IDK, I could eat taco or I could eat sushi
A : You coud eat many things!
4. Say something possible
A : Oh, I lost my phone, Have you seen my phone?
B : No, I haven't, It could be charge in your room.
A : Thanks for telling me, I'll go to my room.