The opposite of singular is plural. The past tense of see is saw and is used for all persons, singular and plural.
Second person singular is you saw.
Second person plural is you saw.
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The second person singular in English is largely obsolete but that does not mean that it is no longer extant. The personal pronoun "thou"and "thee" in the nominative and vocative cases respectively are still used in special circumstances, such as prayers to the Almighty, whether thou believest in Him or not. There are still some communities around the world which continue to adhere to these old forms. I can think of no reason why these communities should be discouraged from keeping to their ways
The use of the plural form to express a singular merely means that, for a few words, there are two forms of expression accepted by most people schooled in the English language. Just because the plural form is used for the singular does not mean that the plural is also a singular. By analogy, "you ain't" is not a proper plural, present tense of "to be" but merely a form that is accepted as such in some communities. There is no compelling need to legitimise any of these evolved forms. They are already legitimate wherever they are in frequent use.
The second person singular past tense, indicative mood and active voice for the active voice infinitive "to see" is "thou sawest" but the plural form is, of course "you saw." "Thou sawest" It just so happens that the second person indicative of the verb "to saw" (say, a log) is also thou "sawest."
Is there a "red line" beyond which frequent use no longer legitimise a form? Perhaps not but I think there is. For instance, the use of "thee" to mean "thou" is a solecism, even though I have observed its use in Latter Day Saints communities, Perhaps such use is indicative of sheer grammatical sloppiness or ignorance or, perhaps it is because the form "thee" is used in the vocative, accusative, genitive, dative, ablative, and possibly dual, cases of "thou," hence more frequently.
The singular past tense of "have" is "had."
The past tense of have is had for both singular and plural subjects.
The past tense of "will" is "would". The past tense of "to be" is "was" or "were".
The past tense of finish is finished. The past tense of be is was/were.
The second person singular, past tense is jumped: You jumped right over the obstacle.
The singular past tense of "have" is "had."
The past tense of have is had for both singular and plural subjects.
The past tense of "will" is "would". The past tense of "to be" is "was" or "were".
The past tense of finish is finished. The past tense of be is was/were.
It is past tense, first person singular
depends on if its: past tense indicative singular 1: sende past tense indicative singular 2: sendest past tense indicative singular 3: sende past tense indicative plural 1,2,3: sendon past tense subjunctive singular 1,2,3: sende past tense subjunctive plural 1,2,3: senden Participles: sended, send
The second person singular, past tense is jumped: You jumped right over the obstacle.
Lost is the past tense of lose. In the past tense, it's the same for all persons.
The third person singular past tense of "hear" is "heard."
Had is the past tense of have. Has is the present tense, third person singular conjugation of have.
Has is the present tense, third person singular conjugation of have. The past tense and past participle of have is had.
No, "is" isn't the past tense of is. "Is" is the present tense, third person singular conjugation of be. The past tense of "is" is "was".