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. Kate _____________  since six in the morning.

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. Indrajith ______________ all day.

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

3. I _____________  this movie for two hours.

In this sentence , the correct form of tense that can be placed in the blank part is has been watching 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 D , which is Has been working , Has been dancing , Have been watching .

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 .