1 necessity
2 necessity
改为被动分别是
1 Dinner has to be made by Mary tonight.
2 A lot of homework must be done by Tom.
百度教育团队【海纳百川团】为您解答,若帮了您,记得采纳哦-,0第二题后面的部份可以抄回来么?是的后面的直接抄下就可以啦 百度教育团队【海纳百川团】为您解答，若帮了您，记得采纳哦-,0has to 是modal verb么 为甚麼在後面加be?回答完就采纳^^has to do 是搭配被动形式为has to be done 百度教育团队【海纳百川团】为您解答，若帮了您，记得采纳哦-,0