Subject + may have been + Verb4
Positive: She may have been teaching for 10 years.
Negative: She may not have been teaching for 10 years.
Interrogative: May she have been teaching for 10 years?
Negative Interrogative: May she have been teaching for 10 years?
WH-Questions:
- What may she have been teaching for 10 years?
- Why may she have been teaching since her childhood?
- Who may have been teaching for 10 years?
- Where may she have been teaching for 10 years?
- Which subject may she have been teaching since March?
- Whom may she have been teaching for 10 years?
- How may she have been teaching for 10 years?
- How many students may she have been teaching for 10 years?