Unit 4 - Welding and fabrication

• Engels
• MBO
• Studiejaar 2

Unit 4 - Welding and fabrication 

Lesson goals

• Learn about the past perfect simple and past perfect continuous
• Discuss the answer to the case study assignment 
• Learn about aircraft welding and fabrication

Past perfect simple and past perfect continuous 

Usage - PPS

Form 

Signal words

Usage - PPC

Form

The mechanic _____ the faulty component before the next flight.

1. has replaced
2. had replaced
3. was replacing
4. replaced

By the time I arrived, the mechanics ____________ (work) on the engine for three hours.

1. had been working
2. have been working
3. had worked
4. was working

The maintenance team _____ the aircraft before it was scheduled to depart.

1. were inspecting
2. had inspected
3. inspected
4. has inspected

The aircraft ____________ (undergo) regular maintenance before the incident occurred.

1. had undergone
2. was undergoing
3. underwent
4. has undergone

By the time the aircraft took off, the engineers _____ the engine.

1. repaired
2. was repairing
3. had repaired
4. have repaired

She was tired because she ____________ (work) on the avionics system all morning.

1. had worked
2. was working
3. have been working
4. had been working

The technicians ____________ (inspect) the landing gear for any faults before the flight.

1. had been inspecting
2. had inspected
3. have been inspecting
4. were inspecting

When the pilot arrived, the engineers ____________ (fix) the hydraulic system for two hours.

1. were fixing
2. had been fixing
3. have been fixing
4. had fixed