Question

by the time my mother, retires, I will be working for Company for 7 years
I will be working I have been working I will have been
will had been working
working​

Answer 1

By the time my mother, retires, I will have been working for Company for 7 years.

Option (c) is correct.

Explanation:

• In the future perfect continuous tense, "will or shall have been" are used.
• Shall and will are used with he, she, it, they, we, you.
• this tense emphasizes the time period of an event in the future.
• The sentence structure of future continuous tense is
• Subject + will/shall + have + been + 1st form of verb + ing + object.

Answer 2

Answer:

I will have been working