The following sentence has been divided into parts. One of them may contain an error. Select the part that contains the error from the given options. If you don't find any error, mark 'No error' as your answer.
By the time she retires, / she has been teaching / at the university for 30 years.
- Ashe has been teaching
- Bat the university for 30 years
- CBy the time she retires
- DNo error
Solution & Step-by-step Explanation
The error lies in the part "she has been teaching".
The phrase "By the time..." combined with a present tense verb ("retires") indicates an action that will be completed relative to a point in the future. For an action that will continue up to a certain point in the future, the Future Perfect Continuous Tense should be used.
Hence, "she has been teaching" (Present Perfect Continuous) should be replaced with "she will have been teaching".
The phrase "By the time..." combined with a present tense verb ("retires") indicates an action that will be completed relative to a point in the future. For an action that will continue up to a certain point in the future, the Future Perfect Continuous Tense should be used.
Hence, "she has been teaching" (Present Perfect Continuous) should be replaced with "she will have been teaching".