We use since to refer to a point of time. Since can refer to a point after a specific time or event in the past.
Active Voice = Subject + believe/find/claim/consider/know/report/say/think/ + that + clause.
Passive Voice = It + be + third form of a verb + clause.
People believe that every child is born with different abilities. It is believed that every child is born with different abilities.
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.
He did hard work and Succeeded
اس نے سخت محنت کی اور کامیابی حاصل کی۔
The past tense “did” requires a verb in the past tense as well.
So, "succeeded" matches “did hard work.”
Given sentence is in simple past tense.
Subject + (was / were) + V3 + Optional Agents.
This is a sentence of Present Indefinite Tense.
Present Indefinite Tense
Active Voice: Subject + Verb + Object
Passive Voice: Object + is/am/are+ third form of a verb + by + subject.
Generally Past Indefinite/Simple Tense is used before words like yesterday, last night, last year, last June etc.
"Have gained" is the present perfect tense.
It shows a completed action with relevance to the present.
Please /kindly → You are requested to. You are requested + rest of sentence.
Note: Please and kindly are not used in passive voice.