155. hang 用法：表示悬挂，过去式和过去分词都是hung; 表示绞刑，过去式和过去分词都是hanged.
Note: 表示悬挂的状态时，用不及物动词形式。如：My shirt is hanging on the wall.
156. happen 用法：happen to do sth. It so happened that… sth. happen to sb.
Note: 区分是碰巧还是发生，记住，人作主语是碰巧；物作主语是发生。
157. hate 用法：hate to do; hate doing
Note: 不定式表示某一次具体的情况；动名词表示习惯性动作。如：I hate walking in the rain. I hate to go out tonight.
158. have 用法：have sb. do/doing/done; have to do
Note: have to do表示客观需要；而must表示主观看法。
159. head 用法：Use your head; head of the department; head for
Note: 可以用作量词，如：a head of cattle.
160. hear用法：hear about / of / from hear sb. do sth. / doing sth. / done ; hearing 听力
Note: hear 表示结果；listen 只表示动作。Hear from 收到某人的来信。
161. heart 用法：by heart; heart and soul; lose heart
Note: 表示灰心的时候不能说lose one’s heart.