如：The sun shines every day.请问些处shines为什么要加s?不是说只有在第三人称单数后面跟的动词才加s的吗?这个是为什么呀?

The sun shines是什么意思The sun shines, the sun shines brightly . the sun shines so the sun shines and shines如何精确解释 the sun shines and shines,否定句怎么改? the sun shines and the water becomes[ ] The sun shines again after the rain. The sun shines t____ the window make hay while the sun shines. Make hay while the sun shines. and the sun shines on your when the sun shines意思+说明, The sun shines after every storm. sun out comes the shines and (.) The sun shines t_____ the window in the room. The sun shines and the water becomes vapour. The sun shines and the water decomes vapour.问句 Today is the day that the sun shines