I have smiled at you.
The past perfect tense of smile is had smiled.
The present perfect tense of bite is:I/You/We/They have bitten.He/She/It has bitten.
the will in your sentence is present tense, so it is present tense
The present tense of "smile" is "smiles."
The verb in the given sentence, "have understood", is in its present perfect tense. The sentence itself does not have tense, which is a property of verbs only.
The past perfect tense of smile is had smiled.
The present perfect tense of bite is:I/You/We/They have bitten.He/She/It has bitten.
the will in your sentence is present tense, so it is present tense
The present tense of "smile" is "smiles."
The verb in the given sentence, "have understood", is in its present perfect tense. The sentence itself does not have tense, which is a property of verbs only.
The present perfect tense of "finish" is "have finished" or "has finished," depending on the subject of the sentence.
The verb phrase in this sentence is - has mailed - this is present perfect.Present perfect is formed with - have/has + past participle.
Present tense
The present perfect tense of "swell" is "has swelled" or "have swelled," depending on the subject of the sentence. For example, "The river has swelled after heavy rains."
There are two verbs in this sentence have borrowed = present perfect was = past
The present perfect tense is Have/Has Hidden.
The present perfect tense is has/have existed.