Answer
See below.
Work Step by Step
The sentence in "if...then" form is: If there is no pain, there is no gain.
The contrapositive of $p\rightarrow q$ is $\sim q\rightarrow \sim p$.
The converse of $p\rightarrow q$ is $q \rightarrow p$.
The inverse of $p\rightarrow q$ is $\sim p\rightarrow \sim q$.
The negation of $ p\rightarrow q$ is $p\land \sim q$.
Hence here the converse is: If there is no gain, then there is no pain. The inverse: If there is pain, then there is gain. The contrapositive: If there is gain, then there is pain. The negation: There is no pain and there is gain.
