Explanation

Psychology is the scientific study of the mind and behavior. 

Explanation

Present Indefinite Tense

Active Voice: Subject + Verb + Object

Passive Voice: Object + is/am/are+ third form of a verb + by + subject.

Explanation

This is a sentence of Past Continuous Tense.

Active sentences in the past continuous tense have the following structure:
Subject + was/were + -ing form of the verb + object
Passive sentences in the past continuous tense have the following structure:
Object of the active sentence + was/were + being + past participle form of the verb + by + subject of the active sentence

Explanation

Active: Subject + past tense form of the verb + object
Passive: Object of the active sentence + was/were + past participle form of the verb + by + subject of the active sentence

Passive: I was ordered to bring a glass of water by him

Explanation

Active Voice: Let + indirect object + first form of a verb + direct object.

Passive Voice: Let + direct object + be + third form of a verb + by + indirect object.

Explanation

We use at before destination.

Destination means منزل مقصود

At is a preposition here.

For example:

The car will stop at the curb.

Explanation

Pull yourself up: to perform better or improve your position.

Pull yourself up: فرائض بہتر طریقے سے سرانجام دینا

Explanation

should not – (Modal) changes to should not be in Passive.
Given sentence is an Imperative sentence and started with Please that means sentence contains a request in it.

Rule:
Please /kindly → You are requested to. You are requested + rest of sentence.

Note: Please and kindly are not used in passive voice.

Explanation

Active sentences in the past continuous tense have the following structure:
Subject + was/were + -ing form of the verb + object
Passive sentences in the past continuous tense have the following structure:
Object of the active sentence + was/were + being + past participle form of the verb + by + subject of the active sentence

Explanation

Active Voice: It + be + to + first form of a verb + other sentence

Passive Voice: It + be + for + object + to + be + third form of a verb.