Direct speech : - Direct speech is used to report or rather repeat the words spoken by the speaker or writer in the way it is told by the speaker .

Indirect speech : - Indirect speech is the way in which you convey what someone said to another person, not necessarily using the exact words of the speaker.

Direct Speech - Change in Advise or Command Statement: In command and request statements : The imperative verb of the indirect command  is changed to a infinitive in the direct command. We use words expressing command or request such as ordered, commanded, shouted, demanded etc. We also often change the saying verb to tell.

• Dad told me to do my work. (Indirect Command)
• Dad,"Do your work".(Direct Command)

In the question : -

She asked me to be quiet.

The direct speech of the above sentence is :

She said , "Could you please be quiet " .

While converting into direct speech , place reporter 's speech into inverted commas , then asked is converted into said , then you is placed according to the subject and then the verb could , then the objective part be quiet and then end with exclamation mark .

Thus , the Correct Option is A , which is She said , "Could you please be quiet " .

Direct speech : - Direct speech is used to report or rather repeat the words spoken by the speaker or writer in the way it is told by the speaker .

Indirect speech : - Indirect speech is the way in which you convey what someone said to another person, not necessarily using the exact words of the speaker.

Direct Speech - Change in Advise or Command Statement: In command and request statements : The imperative verb of the indirect command  is changed to a infinitive in the direct command. We use words expressing command or request such as ordered, commanded, shouted, demanded etc. We also often change the saying verb to tell.

• Dad told me to do my work. (Indirect Command)
• Dad,"Do your work".(Direct Command)

In the question : -

1. My mother suggested I see the dentist.

The direct speech of the above sentence is :

My mother said ,  "It would be a good idea to see the dentist".

While converting into direct speech , place reporter 's speech into inverted commas , then suggested is converted into said , then the objective part a good idea to see the dentist .

2. The dentist recommended using a different toothbrush.

The direct speech of the above sentence is :

The dentist said, "I think you should use a different toothbrush".

While converting into direct speech , place reporter 's speech into inverted commas , then recommended is converted into said , then the objective part use different toothbrush .

Thus , the Correct Option is B , which is 1. My mother said ,  "It would be a good idea to see the dentist". 2. The dentist said, "I think you should use a different toothbrush".

Direct speech : - Direct speech is used to report or rather repeat the words spoken by the speaker or writer in the way it is told by the speaker .

Indirect speech : - Indirect speech is the way in which you convey what someone said to another person, not necessarily using the exact words of the speaker.

Direct Speech - Change in Advise or Command Statement: In command and request statements : The imperative verb of the indirect command  is changed to a infinitive in the direct command. We use words expressing command or request such as ordered, commanded, shouted, demanded etc. We also often change the saying verb to tell.

• Dad told me to do my work. (Indirect Command)
• Dad,"Do your work".(Direct Command)

In the question : -

1. The man with the gun warned us not to move.

The direct speech of the above sentence is :

The man with the gun said to us, "Don't move!"

While converting into direct speech , place reporter 's speech into inverted commas , then warned is converted into said , then the him is placed according to the subject which is policemen here and the the verb get , then the objective part out of the car and then end with exclamation mark .

2. The doctor told me to stop smoking.

The direct speech of the above sentence is :

The doctor said to me, "Stop smoking!".

While converting into direct speech , place reporter 's speech into inverted commas , then told is converted into said , and the the verb get , then the objective part stop smoking and then end with exclamation mark .

Thus , the Correct Option is D , which is 1. The man with the gun said to us, "Don't move!" 2. The doctor said to me, "Stop smoking!".