Latin Mention Question on the Imperfect tense and using it in a situation where usually the infinitive would be used (e.g if it were in the present tense)

[LOCVLVS]

I was reading a sentence from Familia Romana and it got me thinking on the imperfect tense. Here is the sentence: 'Nōnne intellegis nōn modo amōrem nostrum, sed etiam familiam tempore augērī?'. I was wondering how this would be expressed if the 'augērī' were to be imperfect, as there is no imperfect infinitive. Would you simply revert to saying it how you would say it if there was no 'intellegis' and you were stating it as it is?

(On a side note I realised the amorem and familiam are in the accusative, despite using passive augeri, I'm assuming this is because it is part of the the complimentary infinitive, so it is the accusative with respect to intellegis?)

Sorry if I am being stupid and have overlooked something obvious about the structure or something; just getting back into my independent Latin studies and couldn't find anything on this online.

 

[scrabulista]

Do you understand not only our love, but also that our family increase in time?
I suppose you would use the perfect passive infinitive to express past tense.

Nōnne intellegis nōn modo amōrem nostrum, sed etiam familiam tempore....auctam esse?

Wait for other opinions.

 

[Pacifica]

Do you understand not only our love, but also that our family increase in time?
I suppose you would use the perfect passive infinitive to express past tense.

Nōnne intellegis nōn modo amōrem nostrum, sed etiam familiam tempore....auctam esse?

Wait for other opinions.

That's correct.

(On a side note I realised the amorem and familiam are in the accusative, despite using passive augeri, I'm assuming this is because it is part of the the complimentary infinitive, so it is the accusative with respect to intellegis?)

Amorem and familiam are the subjects of an accusative-and-infinitive clause (here, specifically, an accusative-and-infinitive indirect statement).

The basics of indirect statements and how the tenses are used there are explained in this post: Indirect Statement | Latin D (latindiscussion.org)