答案:Concord (or agreement) may be defined as the requirement that the forms of two or more words of specific word class that stand in specific syntactic relationship with another, shall also be characterized by the same paradigmatically marked category
He speaks English; They speak English.
There are two types of concord: notional agreement and grammatical agreement
Government is another type of control over the form of some words by other words in certain syntactic construction. It differs from concord in that this is a relationship in which a word of a certain class determines the form of others in terms of certain category. E.g. there is no use doing. There is no use 规定了后面只能用doing