(1)需要;缺少(want;require，lack)[T+n，T+to-inf，T+ing]：～help/a rest/a guidance/a change/protection/financial aid/co-nstant attention 需要帮助/休息/指导/变化/保护/经济资助/经常的关注;I'll call you if anything is～ed. 要是需要什么，我就给你打电话。It is a question that～s very careful consideration. 这是一个需要认真考虑的问题。～to take a rest/know/arrive early/be done soon 需要休息/了解/早到达/立即做;The instruments～to be sterilized.这些器具需要消毒。The working class～s to tackle its problem in a new way. 工人阶级需要以一种新的方式来对付自身的问题。These shoes～repairing. 这双鞋需要修理。These plants～watering every day. 这些植物需要每天浇水。We believed that the army～ed strengthening. 我们认为军队需要加强。My Latin～ed brushing up. 我的拉丁文需要复习。〖同〗require，lack，want，demand;

(2)必须(be obliged to)[T+to-inf]：Does she～ to know? 她必须知道吗? He will～to be looked after. 他必须有人照料。We～to guard against the private seizure of power. 我们应该警惕个人夺取权力。They really～to ask themselves. 他们真的应该问问他们自己。