The word research is a noun, a common, abstract, uncountable noun; a word for a systematic investigation to establish facts or principles or to collect information on a subject.
The noun forms foe the verb to research are researcher, and the gerund, researching.
Researched
researcher
The word industry doesn't have a past tense or a present tense as it is a noun.
Exited is the past tense of exit.
the past tense of end is ended.
The past tense for dip is dipped.
There is no past tense of the word "Aunt".
This question is not valid because the word "did" is already in the past-tense. The present-tense version would be "do".
"Sped" is the past tense version of speed.
The word dived is one form of the past tense of to dive, and the past participle.The other version of the past tense is dove.
The past tense of 'is' is 'was'.
The word "were" is past tense. It is the past tense of the verb "to be."
The word "had" is a past tense verb.
Ate is the past tense of the word eat. Its a past tense word
"received" is the past tense. The present tense of that word is "receive"
What is the past tense word for think
The word "recognized" is in the past tense.
The past tense of the word "accept" is "accepted."
The past tense of the word forget is the word "forgot".