You wanted a simple answer.
It is a present tense irregular verb. BUT the sentence is a past simple sentence the didn't (did not) tells us the sentence is past.
The simple past of the verb "to focus" is "focused."
The past simple of the verb "to hide" is "hid."
"Had" is the simple past and past participle of the verb "have".
The simple past tense of the verb "know" is "knew."
The verb is 'To be' Present simple: # I am, We are # You are # He/she/it is, They are Past simple: # I was, We were # You were # He/she/it was, They were
The simple past tense of the verb "wear" is "wore."
The simple past tense of 'be' is 'was' and 'were'
The simple past tense is had.
The simple past tense of the verb "bring" is "brought."
The simple past form of the verb "become" is "became".
The simple past tense for the verb "fall" is "fell".