Verb tense consistency in a sentence [closed]

I learned that we do not shift tenses between sentences unless there is a time change that must be shown. I have two examples below that I'm not sure whether they're grammatically correct or not.

I was taught by my father, who is very patient.

(Being "Patient" is my father's personality, and it still exists now.

Should I use 'is' or 'was' for the above sentence?)

Objects that characterize the street scenes in my country were taken into account.

(The context for the sentence above is that I already collected the data in my country a couple of months ago, and I'm describing objects existing in my data in my writing. In my opinion, the phrase 'Objects that characterize the street...' is a factual piece of information, and so I use the present tense, although I'm using the past tense for my paragraph. Am I using it in the right way?)

Solution 1:

Your question may be based on a misunderstanding of a 'rule' that was poorly or not fully explained.

It is unusual to shift the tense from one clause or sentence to the next in a narrative. But in general, the tense (verb construction) is chosen on a clause-by-clause basis to accurately represent the time frame of the action or state. In other words, the tense in the first clause does not determine the tense in the second clause.

Your sentences are grammatical and clearly distinguish between past events (your father's teaching / 'the taking into account' of your research) and present or continuing states (your father's patience / common objects in street scenes).