回复：再问两个字，老师们帮我看看是中性还是贬义词呢？谢谢

1） While been asked if he knew Ms A before the accident, Mr Robert denied.

是否可以改为：When asked if he knew Ms. A before the accident, Mr. Robert answered "No."

说明：“Deny”什么？是问题？问题是用不着“deny"的。

2) Mr Robert claimed he did not meet Ms A on 2 July 2011.

是否可改为：Mr. Robert claimed that he did not know Ms. A until July 2,2011. 

说明：没有前文，不知道是不是改句的意思。