The past perfect is a tense in English that you use to talk about events in the past that happened before another action in the past.
The present perfect continuous is used to talk about long actions and events that started in the past and have continued up until the present.
It’s not always clear which tense to use when you talking about the future. This is an exercise about future tenses and you need to choose the correct one.
In this exercise, you need to choose between the past simple or past perfect. Both tenses are used to talk about events in the past.
Sometimes it’s not clear whether you need to use present simple or present continuous. This is an exercise about the difference between these tenses.
The future of can and must is not like the other future tenses. Can and must don’t have an infinitive form so
The going to-future is a tense in English to talk about the future. You use it to express your opinion or to talk about your intentions.