What does a verbs tense tell you?

Verb tenses tell us how an action relates to the flow of time. There are three main verb tenses in English: present, past and future. The present, past and future tenses are divided into four aspects: the simple, progressive, perfect and perfect progressive. These are called helping, or auxiliary verbs. The tense of a verb can also tell us things like whether the action is habitual, ongoing, or completed. This is called the aspect of the verb, which is part of tense.

The big bang theory suggests that the universe is constantly expanding and that stars, galaxies and other entities are moving away from each other. if there were a galaxy moving closer to earth then that would contradict the big bang theory since the entities should be moving away from earth and from each other.

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