Could -Coudn't, an interactive worksheet by pau_rdgz
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Could and Couldn't, an interactive worksheet by sofiafernandez
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Can I - for informal requests,
Could I - for more formal requests,
May I - for even more formal requests,
Might I - for very formal requests.
Can I - for informal requests,
Could I - for more formal...
How to request something, an interactive worksheet by Arturo_ReyBau
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