English Grammar and Usage

 As the event has taken place already, the past tense'has bought' is used.

 The sentence suggests Sanjana is still exercising. Hence, 'has been taking' is used.

 As the action is still going on, we use the present perfect continuous form'has been playing'.

 Case of drawing conclusion. In such cases, we use present perfect continuous form.

 'have always liked' means you still like old hindi songs.

 'All day' means 'throughout the day'.In such cases,present perfect contnuous tense is used.

This means'what has he done to himself and is still doing' that makes him look so tired.

 A simple past tense indicating that the action is completed.

 'has had' means the effect of the bad dream is still continuing.

The present perfect tense in the reported speech will change to past perfect tense as per the simple past reporting speech.

Taro Aso served as the Prime Minister of Japan from 2008 to 2009.

The word 'When' is used incorrectly as a conjunction here. It should be 'During' or 'While' to indicate the time frame of the vacation.

The word 'enjoyable' starts with a vowel sound, so the article 'an' should be used instead of 'a'.

The adjective 'different' is standardly followed by the preposition 'from' in British and international English.

When 'angry' is followed by a person, the preposition 'with' is used. 'At' is typically used for things or situations.