翻译：I wanted to know how he wanted to improve our marriage.
Chinese doesn't really care about tenses as much as English. This sentence can be used to talk about present or past tense. Don't worry about it too much.
Regardless of grammatical tense, this sentence is indeed weird haha
I want to know what he wants to do to improve our marriage.
请教此句，1.可否用that来接在HOW的前面？ i want to know that how ..... 2.how后面可否接does? .... how does he want to improve our marriage?