Hi,
Why is that the ones I listed below can't be used in the first conditional, whereas 'might' and 'will' could be used? Is that right?
If I have a pencil, I would/could use it to write a note.
How would be sure that 'would' adn 'could' here are used to refer to the past? I think, depending on how you use them, both can be used to refer to situations that are happening in the present.