my mother....(not look)the front door last night

Simple Past Tense negative
Pattern : S + didn't + infinitive

Answer : My mother DIDN'T LOOK the front door last night.

btw itu lock kali bukan look.

artinya 
''Ibu saya .... (tidak terlihat) pintu depan tadi malam''
not look diganti ''not see''

maaf kalo salah saya tidak mengerti apa pertanyaannya