... Gutman admits that forced separation by sale was frequent,he shows that the slaves’preference,revealed most clearly on plantations where sale was infrequent,was very much for stable monogamy.请问老师,revealed most clearly on plantations where sale was infrequent,书上说这句是...
例: The child doesn't appear to be learning quickly.1。不定式不应该表示还没发生的事情吗? 为什么和进行时态的be learning搭配呢?2。如果这个句子否定 not to be learning 而不是 doesn't appear ,意思一样吗?