For example if someone said she is a performer they would be talking about someone’s job if someone said she performed they’d be talking about past tense and if someone says she’s performing they’d be talking about present. So the -er suffix is a specialty
Sprang is to leave something/someone with a quick movement and strand is to leave Some one/something with out leaving your desired spot like if you were to break up with someone you left them by their self "stranded"