Future perfect continuous tense

Structure of future perfect continuous
positive negative question
Next year I'll (I will) have been working in the company for 10 years. I won't (will not) have been working in the company for 10 years. Will you have been working in the company for 10 years?
Future perfect continuous – common mistakes
Common mistakes Correct version Why?
I will have working in the company for five years next month. I will have been working in the company for five years next month. The form of the future perfect continuous is will + have + been + present participle.
I will haven't been working in the company for five years next month. I will not (won't) have been working in the company for five years next month. The form of the negative is will not + have + been + present participle.
Will have you been working in the company for five years next month? Will you have been working in the company for five years next month? The form of the question is will + subject + have + been + present participle.
I'll have been working in three different positions at the company by the end of the year. I'll have worked in three different positions at the company by the end of the year. We use the simple form when we give the number of completed actions.

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