is后面为什么可以跟to,是固定搭配还是?这个是原句,还有希望帮我翻译下.Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordingtoanewstudyonpopulat

Question

is后面为什么可以跟to,是固定搭配还是?
这个是原句,还有希望帮我翻译下.Older people must be given more chances to learn if they are to contribute to society rather than be a financial burden,according to a new study on population plublished recently.

Answer 1

根据最近新的人口公布,老人应该给予更多的机会学习是否能对社会做贡献,而不是成为经济负担.is后面跟to是be to do sth的结构,表将来.