Question

The only thing he could possibly do
(make it negative)​

Answer 1

The sentence can be changed into negative sentence as follows:

The only thing he could possibly not do.

What is a negative sentence?

• In the field of English grammar, such a sentence which gives a negative meaning is a negative sentence.
• A statement appears to be not true or false in a negative sentence.
• A negative sentence is made by the addition of 'not' in a sentence.

Answer 2

The only thing he could possibly not do.