actually, you don't NEED to match the tenses at all. the sentence can be broken down:
"I argued "
I is your subject
argued is your verb
the phrase '...that McD is/was/has been/will never be good for you.' is a 'noun phrase' and has it's own tense (so to speak)
it truly depends on waht you want to say:
I argued that McDonald's is good for you I argued that McDonald's was good for you I argued that McDonald's will never be good for you I argued that McDonald's has been good for you I argued that McDonald's hasn't been good for you I argued that McDonald's is good for you
Matching the tense
actually, you don't NEED to match the tenses at all. the sentence can be broken down:
"I argued "
I is your subject
argued is your verb
the phrase '...that McD is/was/has been/will never be good for you.' is a 'noun phrase' and has it's own tense (so to speak)
it truly depends on waht you want to say:
I argued that McDonald's is good for you
I argued that McDonald's was good for you
I argued that McDonald's will never be good for you
I argued that McDonald's has been good for you
I argued that McDonald's hasn't been good for you
I argued that McDonald's is good for you
you see?