The past tense of investigate is investigated. The third-person singular simple present indicative

form of investigate is investigates. The present participle of investigate is investigating. The past participle of investigate is investigated.

What tense should investigative reports be written in?

Using the correct verb tense - Lab reports and research papers should be mainly written in the present tense. You should limit the use of the past tense to (1) describe specific experimental methods and observations, and (2) citing results published in the past.

Will be going to past tense?

BE GOING TO in the Past Tense

When BE GOING TO is used in the past tense, it refers to something that was going to happen but in the end it did not happen. Examples: I was going to call you but I lost your phone number. It was going to rain but suddenly the sun appeared.