This is her blue bike.blue已经是蓝色的意思了,后面不能再加color
Mr Green is in China now. China是专有名词,前面不能再加定冠词the 了
Can you spell pen ,please?这里的pen是指pen这个单词,而不是一支笔.请问你能把pen这个单词拼写一下吗 .拼写什么词.这个词前不加冠词.比如Can you spell Green, Please?