'Is' is present tense be verb so no.
But you can use the past participle after is in a passive sentence.
The milk is kept in the fridge.
No, the verb "is" is present tense, so it is not used with past tense verbs.
'Conference' is a noun, it doesn't have a past tense.
"Used" is the past tense of use.
Eager is not a verb so it doesn't have a past tense form but you can still use it in a past tense sentence. eg He was eager to right the wrong he had done.
The past tense is used.
in a sentence or as a verb
You use the past tense form which is 'had'.
Is can be used in the past tense if it's in its past tense form, which is was.
"is' is present tense. For past tense use was or were.
The past tense is involved.
I used the past tense to answer this question.
'Who' is a pronoun, it doesn't have a past tense. But you can use the word "was" as in "who was on the phone?".
No. The word "are" is present or future tense. The past tense would be "were".
Would is the past tense for will
'Conference' is a noun, it doesn't have a past tense.
No, the past tense is always put.
is - is present tense. He is from China. was - is past tense. He was sick last week.
You have to you have in present tense. You had to use had to write that sentence- use had in past tense.