Verbs tell you if a sentence is past present or future.
There is no future tense verb in this sentence. The sentence is present simple (is).
The two verbs are: will do = future watches = present simple
The present is a moment in time discernible as intermediate between past and future
No, the sentence "By that time he will have been gone for three days" is in future perfect continuous tense.
It is the present tense, but not true.
To determine the tense of a sentence, look at the verb in the sentence. If the verb is in the past form (e.g., "walked"), the sentence is in the past tense. If the verb is in the present form (e.g., "walks"), the sentence is in the present tense. If the verb is in the future form (e.g., "will walk"), the sentence is in the future tense.
Many people have no hope for the future. To make the future strong we need work hard on the present.
each group will prepare a number.
Insurance is a future financial security from little present savings.
If a verb happens in the past, present, or future
The sentence "others refer to them as giant rivers of ice" is in the present tense. The past tense would have used referred, the future tense would have used, will refer.