WHICH TENSE?
The study examines the effects of climate change.
Present Simple
The research team _______ (analyze) the results at the moment.
is analyzing
The study examines the relationship between sleep and academic performance.
Question: Why is the Present Simple used in this sentence?
To talk about the study, its topic, or its main purpose.
The scientists finded a possible explanation for the results.
The scientists found a possible explanation for the results.
The professor explains the main concepts clearly.
Change to the Simple Past.
The professor explained the main concepts clearly.
The researchers are analyzing the data collected from the participants.
Present Continuous
The researchers _______ (conduct) the experiment last year.
conducted
The researchers are collecting data from university students this month.
Question: Why is the Present Continuous used?
To talk about an action that is happening now or around this time.
The article discuss the effects of social media on students.
The article discusses the effects of social media on students.
The students read academic articles in class.
Change to the Present Continuous.
The students are reading academic articles in class.
The researchers conducted the experiment in 2024.
Past Simple
Researchers usually _______ (collect) data from different sources.
collect
The study showed significant differences between the two groups.
Question: Why is the Past Simple used?
To talk about a result from a completed study in the past.
The researchers is studying the effects of air pollution on health.
The researchers are studying the effects of air pollution on health.
The students wrote their answers during the activity.
Change to the Past Continuous.
The students were writing their answers during the activity.
Scientists have developed new methods to analyze the data.
Present Perfect
While the researchers _______ (analyze) the data, they found an unexpected result.
were analyzing
The researchers were conducting the experiment when the equipment stopped working.
Question: Why is the Past Continuous used?
To talk about an action that was happening in the past when another action happened.
The students was reading the article when the professor asked a question.
The students were reading the article when the professor asked a question.
The university created a new research program.
Change to the Present Perfect.
The university has created a new research program.
The researchers had collected all the data before they started the analysis.
Past Perfect
The researchers _______ (examine) several studies on this topic, but they _______ not _______ (use) this method before.
have examined / had not used
The researchers have published several studies on this topic. Before this project, they had focused mainly on laboratory experiments.
Question: Why are the Present Perfect and Past Perfect used here?
Present Perfect: To talk about past actions that are connected to the present.
Past Perfect: To talk about an action that happened before another past action.
The researchers have finished the experiment before they started the analysis.
The researchers had finished the experiment before they started the analysis.
The team completed the first stage before the next stage began.
Change to the Past Perfect.
The team had completed the first stage before the next stage began.