
THE PRESENT PERFECT TENSE
Form
The present perfect tense is formed with the present tense of the auxiliary verb to have (have/has)+ the past participle: I have worked.
SPELLING/ PRONUNCIATION
The past participle in regular verbs has exactly the same form and pronunciation as the simple past, i.e. loved, walked etc.
In irregular verbs, the past participles vary and have different forms in the third column.
The negative is formed by adding...