Present tense : Astronauts go to the space station several times a year., A crew of three astronauts is waiting to take off.  , Past tense : They've trained for this trip for three years. , Present perfect: They felt uncomfortable while they were training. , Future tenses: The rocket takes off in 15 minutes. , They're staying on the space station for the next 15 days.  , All of them are going to travel into space for the first time. , Soon they will have a great view of earth. , Conditional clauses: If they cancel this launch, they will go next month. ,

Using different tenses

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