The present tense of tasted is taste(s).
taste
taste
It is "taste/tastes".
have/has tasted
Yes, the sentence is in the present tense.
The oranges this season taste sour.
The word tastes is a verb. It is the present tense of taste.
Present tense is used to describe things that are happening now or are generally true. Past tense is used to describe things that have already happened.
The future tense is will taste.
The verb is is the present tense.
Present perfect tense.
"you do" is present tense. The past tense is "you did" and the future tense is "you will do".
The present tense of "will be" is "am/is/are." For example, "I am," "he is," "they are."