had been curving

• past perfect progressive

  past perfect progressive

  Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.

  of curve.
  curve

  noun

  a continuously bending line, without angles.

Related Words

• bend
• buckle
• bulge
• coil
• crumple
• curl
• loop
• skew
• spiral
• swerve
• twist
• veer