Explanation

• Specific time is given in the last.
• Therefore, past indefinite tense should be used in the beginning.
• Columbus discovered America. 

Explanation

Have you ever been to China  کیا آپ کبھی چین گئے ہیں

**

The verb 'been' is always used with has/have/had, and we use it in the perfect tense. 

Been: سفر کرنا، جانا، دورہ کرنا

ND-8-08-2023

Explanation

if he offers me a job, I will accept it.

we use "will accept" because it expresses a future action

This use of "will" is common in first-conditional sentences, which describe future actions that are likely to happen.

ND7-3-2023

Explanation

"They take tea every morning".

Whenever a regular habit or habitual action is performed then we use the first form (V1) of the verb

as the sentence forms present indefinite tense in habitual actions

Simple Present Tense (Indefinite Tense):

Formula.

Subject + base form of the verb/verb+s/es(if needed) + rest of the sentence.

ND08-3-2023

Explanation

How long have you been waiting here? 

“How have you been?” is the present perfect tense.

It means that I want to know what you've been doing since 

ND08-3-2023

Explanation

This sentence is passive voice so use third form 

Explanation

I am going China next year .

Explanation

This is a sentence of Past Indefinite Tense.

Usually first form of verb is used with did.

Go is the first form of verb.

He did not go there. 

Explanation

A helping verb always stands in front of a main verb. 

Explanation

A verb phrase consists of a verb, or of a main verb following a modal or one or more auxiliaries