Yes
Increased is the past tense of increase.
Yes the form is -- have/has + past participle. My wages have increased. The price of petrol has increased.
past: I was; you were; he/she/it was present: I am; you are; he/she/it is
Recreational vehicle sales have increased in the past couple of years. Relying on statistics, financial experts have decided that this is showing an economic rise.
Have is present tense. The past tense is had.
There is a past, present, and future. There was a past; there is a present and there will be a future.
what is present past
Present - am. Past - was and were.
Past - was Present - is Future - will be
Footballs used to be made out of pigs guts but now for the modern game they use leather or plastic for the outer skin
past: I did, you did, he/she/it did; present: I do, you do, he/she/it/does
Present tense - clean. Past tense - cleaned. Present tense - work. Past tense - worked. Present tense - play. Past tense - played.