Tense : - The tense of a verb in a sentence expresses time the event has occurred. There are three tenses of a verb: Present, Past and Future: time now, time then and time to come.

Present Perfect Continuous Tense:

Present Perfect Continuous Tense is used for an action that began at some time in the past and is still continuing.

Examples:

• Anmol has been working for four hours.
• It has been raining since morning.

The first sentence implies that Anmol started working four hours ago and is still working. Similarly, in the second sentence, it started raining in the morning and is still continuing now. In other words, both the actions in the two examples started in the past and are continuing in the present. Therefore  present perfect continuous has been used.

In the question : -

1. I ____________  out for two months now.

In this sentence , the correct form of tense that can be placed in the blank part is have not been working as it is used to show for an action that began at some time in the past and is still continuing.

2. Cherina ___________  on this essay for a week.

In this sentence , the correct form of tense that can be placed in the blank part is has been working as it is used to show for an action that began at some time in the past and is still continuing.

3. Preethi ___________  as an English teacher for two years.

In this sentence , the correct form of tense that can be placed in the blank part is has been working as it is used to show for an action that began at some time in the past and is still continuing.

Thus , the Correct Option is A , which is Have not been working , Has been working , Has been working .

Tense : - The tense of a verb in a sentence expresses time the event has occurred. There are three tenses of a verb: Present, Past and Future: time now, time then and time to come.

Present Perfect Continuous Tense:

Present Perfect Continuous Tense is used for an action that began at some time in the past and is still continuing.

Examples:

• Anmol has been working for four hours.
• It has been raining since morning.

The first sentence implies that Anmol started working four hours ago and is still working. Similarly, in the second sentence, it started raining in the morning and is still continuing now. In other words, both the actions in the two examples started in the past and are continuing in the present. Therefore  present perfect continuous has been used.

In the question : -

1. They ___________  for the farewell programme.

In this sentence , the correct form of tense that can be placed in the blank part is has been practising as it is used to show for an action that began at some time in the past and is still continuing.

2. Sam ____________  for you.

In this sentence , the correct form of tense that can be placed in the blank part is has been asking as it is used to show for an action that began at some time in the past and is still continuing.

Thus , the Correct Option is B , which is Have been practising , Has been asking .

Tense : - The tense of a verb in a sentence expresses time the event has occurred. There are three tenses of a verb: Present, Past and Future: time now, time then and time to come.

Present Perfect Continuous Tense:

Present Perfect Continuous Tense is used for an action that began at some time in the past and is still continuing.

Examples:

• Anmol has been working for four hours.
• It has been raining since morning.

The first sentence implies that Anmol started working four hours ago and is still working. Similarly, in the second sentence, it started raining in the morning and is still continuing now. In other words, both the actions in the two examples started in the past and are continuing in the present. Therefore  present perfect continuous has been used.

In the question : -

1. He _____________  on this project for a week.

In this sentence , the correct form of tense that can be placed in the blank part is has been working as it is used to show for an action that began at some time in the past and is still continuing.

2. Manu ___________  of sending in his resignation letter.

In this sentence , the correct form of tense that can be placed in the blank part is has been thinking as it is used to show for an action that began at some time in the past and is still continuing.

Thus , the Correct Option is A , which is Has been working , Has been thinking .