since什么词性

since连词词性。

Since i am not crazy， i do not care .既然我没有发疯，我就毫不在乎。

He had changed， himself， since then .从那时起，他自己也改变了很多。

Since then he had drunk and stormed .从那时起他就一直酗酒，使性子。

He had cut me ever since my marriage .自从我结婚，他就和我绝交了。

Since then he has been drawing a pension .从那时起他一直领退休金。