love is like war,easy to begin but hard to end这里be动词后面为什么用动词

love is like war,easy to begin but hard to end这里be动词后面为什么用动词 love is like war,easy to begin but hard to end Love is easy to start but hard to end,and work is hard to st it is easy (to be)wise after the event为什么用be?be不是be动词 代表的是am 求翻译!Love is like war.easy to start,difficult to finish,and i begin to 后面瞬间\延续性动词都能加吗? Be动词后面加ingKate is flying to HeBei this winter.为什么要用be+动词ing? easy to be in love with each other but hard to get on love u is easy to say,but hard to follow,people are strange to love each other is easy but tomake friend is hard" 动词后面结动词用to do?形容词后面+to do?be 动词后面不能加动词原形? be动词(is,are...)后面,什么时候+doing,什么时候+to do