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."
'is' is a present tense
The verb is is the present tense.
It was, (past tense) it is, (present tense) it will be( future tense)
The past tense of did is did. The present tense of did is do. The future tense of did is will do.
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.
It's a past tense sentence. Built is the past tense of build.
Built is a past tense adjective, "the house is built." Build is a verb "please build me a house."
'is' is a present tense
The verb is is the present tense.
Present perfect tense.
"you do" is present tense. The past tense is "you did" and the future tense is "you will do".
It was, (past tense) it is, (present tense) it will be( future tense)