I have my own problem, may be others too. I'm confused with the usage of 'Could'. I have the following problems.
Conditional sentences:
Well, I could go with you if you really wanted me to.(I have seen this word written.)
Can't we write it following way:
Well, I could go with you if you really want me to.
and if we can or can't, What are differences between the two?
Another example:
You could take the ferry if you wanted to, if that seemed like a good idea to you.(I have seen this word written)
Can't we write it as:
You could take the ferry if you want to, if that seems like a good idea to you.
Another example
Can we use 'Could' following way to speak about present continuous:
John could be the one who is stealing the money.
I have confusion about if writer is speaking about past or present or future. It would be nice if someone can/could explain this to me with a few examples.