He didn't go to school because his head hurts.
这里hurts 作什么词性什么成分,his head hurts在这里是句子还是短语?
hurt 是动词,不及物动词,表示“疼痛”,because his head hurts 的意思是“因为我头痛”,它不是短语,它是原因状语从句。
He didn't go to school because his head hurts. 他没有去上学,因为他的头很痛。
又如:
My head hurts. 我的头很痛。
My feet hurt. 我脚疼。
Tell me where it hurts. 告诉我哪里痛。
My tooth/back hurts. 我的牙/后背疼。
Fred’ s knees hurt after skiing all day. 滑了一整天的雪后弗雷德双膝疼痛。