Past Perfect Continuous

• We use the past perfect continuous to talk about an action that started in the past and continued up to another time in the past. It emphasizes the duration of the activity before something else happened.
• Subject
• Auxiliary
• Main Verb (-ing)
• Time Expression
• We
• had been designing
• the app
• for six months.
• She
• hadn't been checking
• the survey data
• before the meeting.
• Had
• you been using
• the wrong assumptions
• all week?
• Remember
• Form the past perfect continuous with had + been + verb-ing.
• Use it for actions continuing over a period before another past action.
• State verbs (like know, belong, seem) are not used in continuous forms.
• Examples
• Brian had been working in Seattle for two years before he joined our product team.
• They realized they had been targeting the wrong segment for months.
• Common mistakes
• We were designing the app for three months when we saw the survey.
• We had been designing the app for three months when we saw the survey.

Complete the sentences

• When Jessica arrived in Chicago, she (work) ____ on the new wireframes all morning.
• Kevin realized that his team (ignore) ____ the actual users' feedback.
• How long (you / design) ____ before you found the research gap?
• The Boston studio (not / use) ____ the correct target segment.
• Before the manager called, Mark (check) ____ the analytics dashboard.
• They (test) ____ the interface for weeks before the bug appeared.

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