KFUPM Grammar Present, Past Perfect , Future- Continuous forms

By the time the storm ended, it ______ heavily for six hours.

• rains

• had been raining

• is raining

• will have been raining

Answer explanation

The correct choice is 'had been raining' because it indicates an action that was ongoing in the past before another action (the storm ending). The other options do not fit the past perfect continuous tense required here.

By 2030, scientists ______ new solutions to combat climate change for decades.

• are researching

• research

• had been researching

• will have been researching

Answer explanation

The correct choice is 'will have been researching' as it indicates an ongoing action that will continue until 2030, emphasizing the duration of research efforts against climate change.

The students ______ a documentary about climate change which is not finished now.

• are currently watching

• watch

• had been watching

• will have been watching

Answer explanation

The correct choice is 'are currently watching' because it indicates an ongoing action that is not yet completed, aligning with the context of the documentary about climate change that is still in progress.

By this time next year, they ______ the expansion plans for a decade.

• are developing

• will have been developing

• had been developing

• develop

Answer explanation

The correct choice is 'will have been developing' as it indicates an ongoing action that will be completed by a specific future time, aligning with 'by this time next year' and the decade-long context.

By the time we arrived, they ______ the house for days.

• are cleaning

• will have been cleaning

• clean

• had been cleaning

Answer explanation

The correct choice is 'had been cleaning' because it indicates an action that was ongoing in the past before another past event (our arrival). The other options do not fit the past perfect continuous tense required here.

At the moment, they ______ the final touches on the project.

• are putting

• had been putting

• will have been putting

• put

Answer explanation

The correct choice is 'are putting' because it indicates an ongoing action in the present. The sentence describes what they are currently doing, making 'are putting' the appropriate present continuous tense.

By 10 PM tonight, we ______ at the party for four hours.

• are celebrating

• celebrate

• had been celebrating

• will have been celebrating

Answer explanation

The correct choice is 'will have been celebrating' because it indicates an action that will be completed by a specific future time (10 PM), emphasizing the duration of four hours leading up to that point.

By the end of this month, she ______ her fitness routine for a year.

• is following

• follows

• had been following

• will have been following

Answer explanation

The correct choice is 'will have been following' because it indicates a continuous action that will be completed by the end of the month, emphasizing the duration of her fitness routine over the past year.

Now, she ______ her guitar this evening to prepare for the concert tonight.

• is practicing

• had been practicing

• practices

• will have been practicing

Answer explanation

The correct choice is 'is practicing' because it indicates an action happening now, which fits the context of preparing for a concert this evening. The other options suggest different tenses that do not match the time frame.

By next summer, we ______ the new marketing strategy for six months.

• are implementing

• will have been implementing

• had been implementing

• implement

Answer explanation

The correct choice is 'will have been implementing' because it indicates an action that will be ongoing until a specific future time (next summer), emphasizing the duration of six months.