用所给动词的适当形式填空
Laura is often heard ___ (sing) in her kitchen
Laura is often heard __to sing__ (sing) in her kitchen. 感官动词的被动语态后跟的不定式需要带to
答:Listen! Someone___is calling__(call) you.详情>>
答:B 被动语态,be found to do. A中的made与found均为过去分词,冲突!详情>>
问:hArd work 和hArd--working有什么区别
答:一个是名词 一个是形容词撒详情>>