Question

I.........on this problem since morning ​

Answer 1

Answer:

am working/am stuck

Explanation:

I am working/am stuck on this problem since morning.

Answer 2

Answer:

I am working on this problem since morning.

How to frame them?

Simple Present tense:

Subject + first form of verb + s or es

Present Continuous tense:

Subject + is/am/are + first form of verb + ing

Present Perfect tense:

Subject + has/have + third form of verb

Present Perfect Continuous tense:

Subject + has/have + been + first form of verb + ing + since/for

Simple Past tense:

Subject + second form of verb

Past Continuous tense:

Subject + was/were + first form of verb + ing

Past Perfect tense:

Subject + had + third form of verb

Past Perfect Continuous tense:

Subject + had + been + first form of verb + ing + since/for

Simple Future tense:

Subject + will/shall + first form of verb

Future Continuous tense:

Subject + will/shall + be + first form of verb + ing

Future Perfect tense:

Subject + will/shall + have + third form of verb

Future Perfect Continuous tense:

Subject + will/shall + have + been + first form of verb + ing + object

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