since is used in present perfect continuous and past perfect continuous tense but from is used in future perfect continuous tense.These both are used for point of time.
Top answer
Anonymous since is used in present perfect continuous and past perfect continuous tense Your advice implies that since is a verb. It is not.
— AlpheccaStars
Anonymous since is used in present perfect continuous and past perfect continuous tense Your advice implies that since is a verb.
It is not.
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