The verb have the verb have is impersonal when used alone; When not is auxiliary verb: there are many people here. There will be many surprises. There were some difficulties. There were many resources to work. It is also impersonal and, therefore, must be used in the singular when the same verb auxiliary is have: there have been many contestants this year. I do not think that there have been many difficulties. If there had been other activities, attendees had not boring. I don’t understand why have there been so many protests.
Sometimes, to correct the mistakes that are made with this verb, have to resort to the verbs be, or be: we had twenty people. (we were) There we had several that we didn’t. (we were or we were several people) We had too many people in that place. (we were or we were too many persons) We had many that we were not in agreement. (were many who). The verb do the verb do is impersonal when it refers to the chronological aspect (over time) or atmospheric phenomena: it was many years ago. Three hours ago, the newspaper was printed. He made a few horrific heats.
Errors: Corrections: there were many floods last month past. had there had been more than a hundred people. There will be meals and drinks.There will be of that incident were already three months.made there have been too many complaints.There have been made two years went to San Juan de la Cienaga. ago had many who opposed us. We were many that calculation that how one hundred people would be. It would have the year past were made at very low temperatures. did was make several hours. ago made some horrible heats.He did had many that we were not in agreement. We were many people who had several that we oponiamos to that.