First, erosion is a noun and does not have tenses.
The matching verb is "to erode". The past tense is eroded.
Acid rain slowly eroded away the sandstone statues at the capitol.
the past tense of am is was and the past tense of has is had
The past tense of "has" is "had" and 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
"will be" is the future tense of "be". The past tense of "be" is "was/were".
The past tense is she did.
Erosion is a noun and therefore has no tenses. The related verb is to erode, which is regular, so the simple past is eroded.
Eroded. Past tense of erode.
the past tense of am is was and the past tense of has is had
The past tense of "has" is "had" and the past tense of "have" is "had."
The present tense for "erosion" is "erodes."
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
"will be" is the future tense of "be". The past tense of "be" is "was/were".
The past tense is she did.
The word "were" is past tense. It is the past tense of the verb "to be."
The past tense of "will" is "would". The past tense of "to be" is "was" or "were".
The past tense of "you will not" is "you would not."
The past tense is had.