who does the old man "depend on"请问depend后为什么不加s

who does the old man "depend on"请问depend后为什么不加s depend 和 depend on 的区别?depend和depend on后加什么? Whether we'll go depends on the weather depend on 为什么要加s Success depends on hard work中depend为什么要加s it all depends on the weather.depend为何加s?all做什么成分? depend on If we go swimming tomorrow depends on the weather.为什么depend加 The country's fortunes depend on its industry … 为什么a man to depend on不能写为a man to be depended on? he is man who you can safely depend on.是宾语从句 请问Never depend on anybody but yourself Love is very low-priced , the man has no very much depend on