building
not the structure that is already built but what is happening to the current structure that has not been finished before.
Built is a past tense adjective, "the house is built." Build is a verb "please build me a house."
The verb is is the present tense.
The past tense of did is did. The present tense of did is do. The future tense of did is will do.
It was, (past tense) it is, (present tense) it will be( future tense)
Past tense I had Present tense I have Future Tense I will have
Build is present tense. The past tense is built.
The present perfect tense of build is:I/You/We/They have built.He/She/It has built.
Build is the present tense of the verb "to build". Built is the past tense of the verb "to build".
The present perfect tense of build is have/has built.I/We/You/They have builtHe/She/It has built
The difference between build and built is that build is the present tense (or if you make it to build, the infinitive tense) and built is the past tense.
Built is a past tense adjective, "the house is built." Build is a verb "please build me a house."
The verb is is the present tense.
The past tense of did is did. The present tense of did is do. The future tense of did is will do.
It was, (past tense) it is, (present tense) it will be( future tense)
Past tense I had Present tense I have Future Tense I will have
"Has" is in present tense. The past tense is "had".
No 'is' is present tense. am/is/are = present tense was/were = past tense