B站:https://www.bilibili.com/video/BV1RE411C7t5?p=48
1上,5x下,9下,17上, 17下, 22下, 23下, 24上
1上:https://www.cnblogs.com/vhyc/p/12873910.html
5下:https://www.cnblogs.com/vhyc/p/12873969.html
9下:https://www.cnblogs.com/vhyc/p/12875245.html
17上:https://www.cnblogs.com/vhyc/p/12876260.html
17下:https://www.cnblogs.com/vhyc/p/12880879.html
22下:https://www.cnblogs.com/vhyc/p/12882141.html
23下:https://www.cnblogs.com/vhyc/p/12886144.html
24上:https://www.cnblogs.com/vhyc/p/12886487.html
挺好compound 和 complex sentence: https://www.cnblogs.com/vhyc/p/12894555.html