彻彻底底的病句today是个时间副词，不是名词。表示日子用day可以吧这个句子改为：Todayitisasunnyday!或者是：Itissunnytoday.

It'sa【sunnyday】today.It'sa【nice/fineday】today.weather不可数名词,前面不能直接加冠词a,an.

Todayisasunnyday或者It'ssunnytoday

应该是对的啊，be+形容词，today接在句末应该是作副词使用吧

Todayisasunnyday

It'ssunnytoday.(改为同义句)It'sa【sunnyday】today.It'sa【nice/fineday】today.weather不可数名词，前面不能直接加冠词a，an.祝你开心如意！O(∩_∩)O~~

是对的，楼上的，sunny这儿作为形容词，可以用be动词加adj.的形式的，就像It`scoldtoday，你能说它是错的么？不过It'sasunnyday!也是对的，只不过说法不同罢了，如照楼下所说today[简明英汉词典]是名词的话...

Itissunnytoday.今天天晴。

Itisafinedayfine可以表示晴朗的或者Todayisasunnyday/Itisasunnyday或者感叹句Howsunny(itis)today/Whatasunnyday(itis）today希望能帮助你...

1.It'sa(sunnyday)today2.(It'swindy)onthemountain3.It'llrains