to being done 與 being done 區別

題目：

to being done 與 being done 區別
Now English is one of the foreign languages ________ in high schools in shanghai.
A to being taught
B being taught
是不是兩個都能選?
怎麼區分.幫下,感激不盡!

解答：

答案：B.
翻譯：現在英語是上海市中學被授的外語之一.
1.分析句子結構可知,____ in high schools in Shanghai爲後置定語,修飾句中的表語foreign languages.
考慮被修飾詞foreign languages和非謂語動詞teach之間爲被動關係,且後者所表示的動作當前正在發生,所以用being done做後置定語,即B爲正解.
2.A的結構有誤.
如果to是不定式符號,則其後不可能緊跟Ving形式的.如果是to be done（即to be taught）,則其表示該動作當時尚未發生,也不符合句意.
如：I will attend the meeting to be held tomorrow morning.
3.此時只能將to理解成介詞,但是又沒有句中此種結構搭配,由此排除A.
A類的結構試舉一例給樓主看下：
I『m looking forward to being sent to work in a big city like Shanghai.
我盼望被送到像上海這樣的一個大城市中去工作.