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He won't be able run quickly.
I am sure you will able to speak Spanish in three month.
You don't have to say that.It's not polite.
You mustn't wash up.I've already done it.
She had to invite Susan's sister to her party,hadn't she?

He won't be able to run quickly.I am sure you will be able to speak Spanish in three monthDon't say that. It's not polite.Don't wash up. I've already done it.She had to invite Susan's sister to her party, did she?