Be a must to sth 有这种用法?

Be a must to sth 有这种用法? 请问有没有need to be doing sth这种用法 Attentions must be paid to do sth还是doing sth 是否有be thankful to sb to do sth这种形式 see sb.do sth.的被动是be seen to do sth吗如题,还有有没有be seen do sth这种句式, 在英语中有没有be terrified to do sth 这种用法 sth. contribute to sth.有没有这种用法? 有没must to be done这种用法的?如果没,那为什么有need to be done? need sth to do sth有没有need sth for doing sth 这种用法? be addicted to sth./doing sth和addict oneself to sth./doing sth有什么区别 sth be access to sb这种用法对吗 try to do sth.尽力去做某事 try doing sth.试着去做某事 You must try to be more careful.你可要多加小有没有卖这种解释词用法的书买那种？ be in a hurry to do sth. 有没有be busy to do sth. It must be taken actions to do sth.和 Actions must be taken to do sth.的区别这两个意思是不是一样的？ i feel it a great honour to do sth.有这种说法吧. notice sth/sb be doing 这种用法有吗? Do be honest有这种用法么?Do+do sth?