The different forms the verb to be can take in the different tenses.
What forms does the verb to be take in the simple past
Can the verb to be form questions without an auxiliary?
What forms does the verb to be take as auxiliary?
What is the function of the verb to be in the progressive and perfect forms?
What forms does the verb to be take as main verb in the perfect?
Is there a form of the verb to be in the future?
What forms does the verb to be take in the simple present?
I would be is...
Does the verb to be ever use an auxiliary?
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