1.He knows a little English ,but few people can understand him if he uses ___(speak)English.

题目

1.He knows a little English ,but few people can understand him if he uses ___(speak)English.
2.She finds __(watch)English-language movies frustrating because the people speak too fast.

答案

spoken ,这里它不是speak的过去式,而是speak变形后他拥有了自己的意思“口语的,口头的”是个形容词,修饰后面的english（名词）.现在已经成为一种习惯表达.
watching,因为这里的(watch)English-language movies frustrating 是宾语从句,而watching是该从句的主语,不能用动词形式,只有名词或者相当于名词的词才能够充当主语,所以这里用动名词.