Which expression shows weak disagreement?

What does "I'm not sure about that" express?

Which expression shows weak agreement?

What does the expression "That's not always true" mean?

What does the expression "No way!" mean?

What does the expression "I guess so" mean?

What does the expression "That's for sure" express?

What does it mean when you agree with someone?

What does it mean when you agree with someone?

Which expression can you use to express an opinion?