Final answer:
Verb tenses in English indicate time and aspect. Infinitives do not differentiate time but only aspect.
Step-by-step explanation:
In English, verb tenses indicate time differences and aspect. The present tense is used to describe actions or states that are happening currently or regularly, while the past tense is used to describe actions or states that occurred in the past and no longer occur. Infinitives, on the other hand, do not differentiate time; they only differentiate aspect.
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