We know that "can" has the same meaning as "is/are able to".
(In the future) I will add more seats so that more people will be able to sit down.
(In the future) I will add more seats so that more people can (are able to) sit down then.
For the second example, is the temporal marker "then" required for "can sit down" to refer to the future?
Thank you.
PS. There's a mistake in my subject headline. It should be "to refer to the future" and not "to the future".
(In the future) I will add more seats so that more people will be able to sit down.
(In the future) I will add more seats so that more people can (are able to) sit down then.
For the second example, is the temporal marker "then" required for "can sit down" to refer to the future?
Thank you.
PS. There's a mistake in my subject headline. It should be "to refer to the future" and not "to the future".