Shall I compare thee to a summer’s day?
Thou art more lovely and more temperate:
Rough winds do shake the darling buds of May,
And summer’s lease hath all too short a date:
Sometimes too hot the eye of heaven shines,
And often is his gold complexion dimmed;
And every fair from fair sometimes declines,
By chance, or nature’s changing course, untrimm’d;
But thy eternal summer shall not fade,
Nor lose possession of that fair thou ow’st;
Nor shall Death brag thou wander’st in his shade,
When in eternal lines to time thou grow’st.
So long as men can breathe or eyes can see,
So long lives this, and this gives life to thee.

能不能让我把你比拟作夏日？
你可是更加温和，更加可爱：
狂风会吹落五月的好花儿，
夏季的生命又未免结束得太快：
有时候苍天的巨眼照得太灼热，
他那金彩的脸色也会被遮暗；
每一样美呀，总会离开美而凋落，
被时机或者自然的代谢所摧残；
但是你永久的夏天决不会凋枯，
你永远不会失去你美的仪态；
死神夸不着你在他影子里踯躅，
你将在不朽的诗中与时间同在；
只要人类在呼吸，眼睛看得见，
我这诗就活着，使你的生命绵延

注释:
Thou, thee 第二人称单数代词，前者主格，后者宾格。现已为you 所取代。其所有格是thy，或thine, 即现代英语的your。
Art = are. 16、17世纪时与thou连用。
Temperate: 来自拉丁文temperātus，读时为符合押韵规则，可将重音放后。
Shake：shake off。
Lease 租借期限，此处指夏天的长度。
Hath 与第三人称单数连用，相当于现代英语的has。
Dimmed: clouded.
Fair form fair: beautiful thing from beauty. 前后fair意义不同。Declines from beauty。
Chance：极缘，时运，命运。
And every fair from fair sometimes declines,/By chance, or nature’s changing course, untrimm’d：每一个美人总要失去美貌，即使没有突发的以外事件，也逃不过自然界生老病死的变迁。Sometimes: 有的版本作“sometime”: at some unspecified time.
Untrimm’d: untrimmed. 本意为剥去美观的衣服等，此处隐喻夺去美貌等。
Fair thou ow’st: beauty you own. 莎士比亚时代，owe与own通用。古英语第二人称单数后加-st或-est
His shade：shadow of death.
“Nor shall Death brag thou wander’st in his shade”：“死神无从夸口，说你在他的阴影里徘徊”。
To time thou grow’st: you grow as long as time lasts. 与时间同寿。 Grow to = be incorporated with.