How do you express the present continuous tense, the present perfect tense and the general future tense of a short verb? If we use cash in table, will it be confused in the future What's more, how to distinguish the transient verbs from the continuous verbs

How do you express the present continuous tense, the present perfect tense and the general future tense of a short verb? If we use cash in table, will it be confused in the future What's more, how to distinguish the transient verbs from the continuous verbs

I'm coming. I'm coming. 2. The present perfect tense of a short verb is not used with the adverbial of (for, since)