Revision: the complement of degree 得
Subject + Object + Verb + 得 + adjective
Examples:
你 篮球 打 得 怎么样？ ( How good do you play basketball? )
我 篮球 打 得 不错？ ( I play basketball not bad. )
Revision: the potential complements 得 or 不
Subject + Verb + 得 / 不 + Verb + Object
Examples:
我 买 不 到 球票。 ( I could not buy a ticket. )
我 买 得 到 球票。 ( I could buy a ticket. )