CAN, COULD and BE ABLE TO - Part Two

source: Simple English Videos   2017年7月21日
Here's part two of our video on the English modal verbs 'can' and 'could', along with the expression 'be able to'. In part one we looked at how modal verbs work and when we use 'be able to'. In this video we look at how we use 'could' to talk about the past and how we use all three to talk about the future. You can see part one here:
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