Answer:
When my aunt had arrived home after her holidays, she found that there were no lights in the house.
After she had called a friend for help, she saw that there was some water next to the fridge.
My aunt quickly left the flat and spent the night in a hotel.
The police told her not to touch anything before the investigators arrived.
Fortunately, she had a home insurance.
Step-by-step explanation:
Tense is described as the time. In grammar, the different forms of the verb help in denoting the time at which the action takes place. It can be past, present, or future.
The first sentence involves the past perfect tense and therefore, the action that took place first would be written using 'had + V3'(had arrived') and latter action using 'V2'(found'). 'were' in the latter part as the noun 'lights' is the plural.
The next sentence is also written in past perfect and therefore, the first action can be written using 'had + V3'(had called) and the latter action in past indefinite(saw).
The next sentence can be filled using the past indefinite as it is joined using the coordinating conjunction 'and' and therefore, both the actions would be written in the same form i.e. 'V2'(left' and 'spent').
The next sentence expresses the reported speech and thus, it would be written using past indefinite in the first part('told') and 'arrives'(in the direct speech) would be converted into 'arrived'(in indirect).
The last sentence would use past indefinite(had) instead of past perfect(had had) because there is only one action.