Has Poured Which Tense?

The past tense of pour is poured. ... The past participle of pour is poured.

What tense with has?

Have or has is used with a past participle to form the present perfect tense. This tense designates action which began in the past but continues into the present, or the effect of the action continues into the present.

Has become which tense?

It's because typical verbs have same past and past participle forms. But, become is an irregular verb, became is past tense and become is past participle.