speak 方面只能勤说，有机会就用英语跟老外聊。 think方面不好弄，这个取决于个人悟性吧，想象力这东西也不好去表述。

This is the question everyone learning English would like to have answered. The best I can advise is to immerse yourself in an environment of native speakers so you can see the connection between functioning language and the culture.

treat yourself as a native person and forget your mother lanuage