Survey can be a noun or a verb depending on how it is used in a sentence.
See the examples below:
She will survey the students to find out which television shows are most popular. (survey = verb)
Please fill out the survey and mail it to our district office. (survey = noun)
The past tense is surveyed.
survey
The past tense of cooperate is cooperated.
Sob in past tense is sobbed.
The word 'oppressed' is the past participle, past tense of the verb to oppress.The past participle of the verb also functions as an adjective.The noun forms of the verb to oppress are oppressor, oppression, and the gerund, oppressing.
a survey
a survey
Surveillance is not a verb, so it does not have a past tense. The past tense of survey, would be surveyed, if that is what you are looking for.
Survey is a regular verb so add -ed to make the past tense: surveyed.
the past tense of am is was and the past tense of has is had
The past tense of get is got. For isn't a verb and so doesn't have a past tense. The past tense of has is had. Had is already the past tense. The past tense of have is had.
Was and were are both the past tense of be. The present tense is: I am he is you are they are The past tense is: I was he was you were they were
The past tense of "will" is "would". The past tense of "to be" is "was" or "were".
The past tense of "am" is "was" and the past perfect tense of "has" is "had."
HAD is the Past Tense of TO HAVE.
The past tense of "have" is "had."
Past tense I had Present tense I have Future Tense I will have
was is the past tense of am eg. 'I am' (now) but 'I was' (is past)
Wrote is past tense. It is the past tense of write.Wrote is already a past tense.