Question

As soon as the teacher entered the class,the students stood up.(negative)

Answer 1

The answer to your query is:

' As soon as the teacher entered the class, we all stood up.'

The 'stand up' will change into 'stood up' here because the sentence referred to in the question is in past and is narrating an incident that has already occurred.

Answer 2

Answer:

here's your Answer check it out and please mark it as brainlist answer and follow me

Explanation:

Follow me...✌

Mark it as brainlist answer ...✌