There is no verb in "in three days", so there is no tense.
the will in your sentence is present tense, so it is present tense
Begin is the future tense. As in "this event will begin at 10am on Saturday". The past tense is began or begun, as in "it began three days ago".
Begin is the future tense. As in "this event will begin at 10am on Saturday". The past tense is began or begun, as in "it began three days ago".
Three is a number. It has no past tense, it is always three.
Present tense, past tense and future tense.
'separated three substances' is past tense.
had lain or had laid e.g. The hen had laidan egg. The sick child had lain in bed for three days.
The three simple tenses are:Past tenseFuture tensePresent tense
I am grinding the coffee. (present tense) I ground the coffee. (past tense) I will grind more coffee. (future tense)
Using the verb 'laugh'Past tense - I laughed.Present tense - I laugh/He laughs.Future tense - I will laugh.
'Am' is the first person singular present tense conjugation of the verb 'to be'. The past tense conjugation of the first person singular is 'was'. and the past participle form is 'have been'.Examples of all three tenses in the first person singular follow.I am a natural blonde.I was in Paris last year.I have been sick for three days.
will host London will host the Olympics in a few days.