ill的同义词:sick 【病的】 你的采纳我的动力很高兴能够帮助你
seem后面可以跟不定式,也可以跟从句,即seem to 或者seem that结构.所以本句Tom seems to be ill. 的同义句是 It seems that Tom is ill.
may be可能是(在)…… (近义词)can be maybe可能的,大概,或许;(近义词)perhaps; probably
joh is ill的同义句Joh gets ill/sick.或者Joh falls ill/sick.满意请及时采纳,谢谢
fall ill :People who fall ill should seek appropriate medical care. be ill :He didn't attend the meeting because he was ill.
fall ill 动作,瞬间 be ill 状态,持续
你好!He could be ill.仅代表个人观点,不喜勿喷,谢谢.
D fall ill 是瞬间性动词,不可以延续,所以不能和since 短语连用.be ill 是延续性状态,所以可以跟since短语.