Question

please correct me if I am wrong ​

Answer 1

Rationale

She has been practising for more than five hours to be efficient.

Option (a) is the answer.

The above sentence is Present perfect continuous tense.

» Tenses rule

1. Simple Present tense :

Sub + Present form of the verb + Object

2. Simple present continuous tense :

Sub + is/are + Present participle + object

3. Simple Perfect tense :

Sub + has /have + past participle

4. Present perfect continuous tense :

sub + have / has + been + Present participle + for/since + time.

5. Simple past tense :

sub + past form of the verb + object

6. Simple Past continuous tense :

Sub+ was /were + verb ( ing ) [ present participle ]

7. Past perfect tense :

Sub + had + past participle

8. Past perfect continuous tense :

sub + had been - Present - participle ( verb - ing )

9. Simple future tense :

Sub + shall/ will + verb

10. The future continuous :

Sub + will / shall / be + verb - ing

11. The future perfect tense :

sub + shall / will + have + past participle

12. Future perfect continuous tense :

Sub + shall / will + have been + verb - ing

_______________ .

Answer 2

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she has been practising for more than five hours.