还有 1.study on one's own 2.study independently 上述两个“自学”用法很相似,均为动词短语 eg.He studied these subjects on his own / independently.他自学了这些课程. 3.teach oneself 这个“自学”同为动词短语,跟上述“自学"用法类似 eg.He teached himself these subjects. 4.self-study; self-taught; self-learning: 这几个“自学”均为不可数名词,可用来作其他某些名词的定语,例如 self-study courses 自学课程； self-study classes 自习课 等等
