Past perfect simple & continuous: Julie didn't arrive until after I _________ (leave).
had left
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15
Obligation & Ability: Which modals verb do we use to talk about ability in the present?
Can / Can't
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15
Modifying comparatives: Which words can we use to modify a superlative to show a big difference?
By far, easily
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15
Future perfect simple & Future continuous: Which one of these grammar points do we use to talk about things that WILL or WON'T be completed before a definite future time?