has been coasting
Presente perfecto progresivo para el sujeto he/she del verbo coast.

coast

Sam Bourne has been coasting through math class, but this time professor Stacy Seran isn't letting him get off without getting her off first!
Sam Bourne ha estado pasando por la clase de matemáticas, ¡pero esta vez la profesora Stacy Seran no le permitirá bajarse sin haberla sacado primero!
Palabra del día
el adorno