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We can use the present continuous or the present simple to describe something that we regularly do at a particular time. Compare:

1- We usually watch the news on TV at 9.00. (= we start watching at 9.00)

2- We're usually watching the news on TV at 9.00. (= we're already watching at 9.00)

quoted from Advanced Gammar in Use (Marting Hewings)

hello,

Could you please give a context in which 2 would be meaningful?
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1 - Oh, your drama club is going to be on the news? Which program? The one at 9? Great! We'll be sure to see you, because we usually watch the news at 9.

2 - No, I've never seen that program because it comes on at 9, and usually we're watching the news at 9.

or

2 - It was very inconvenient babystting my nephew. He goes to bed at 9, and that was a nuisance, because usually we're watching the news at 9.
Comments  
thank you, Grammar Geek.