Euthanasia may be a good solution for both of patients and their families.
Both/both of follows the same rule as some/some of, all/all of, most/most of, etc. Elsewhere on GuruEAP you can listen to a song that includes examples of most of these (but not, I now realise, both/both of!), plus you can find another post showing how this kind of grammar can be useful in IELTS task 1 writing when describing statistical data.
As usual I suggest you approach this problem lexically – in other words pay close attention to the words (lexis) immediately following these signals. Here are some examples. Continue reading