黄骅港务局杨树增:she was watched to leave her room

she was watched to leave her room she was watched ______her room in silence. 为什么答案用的是to leave，leaving可以么？ 请问she was watched ______her room in silence. 为什么答案用的是to leave，leaving可以么？ She was too busy to write To _____(they) surprise, she was blind. 这个句子为什么前面用过去时，后面用进行时she watched TV while she was washing her clothes. Thanks! 这个句子为什么前面用过去时，后面用进行时she watched TV while she was washing her clothes. Thanks! she was hard to leave.是it was hard to leave her的变形，但为什么？ she had demaned to know whose the child was. She was determined to ___ there in time.完形