have been fastening

• present perfect progressive

  present perfect progressive

  Used to describe an action that began in the past, has continued continuously, and is still in progress.

  of fasten.
  fasten

  verb (used with object)

  to attach firmly or securely in place; fix securely to something else.

Related Words

• adhere
• affix
• attach
• bolt
• glue
• nail
• screw
• solder
• tighten
• truss
• weld