[译] 她渴望他说“我爱你”。
[误] She longed him to say “I love you”.

[正] She longed for him to say “I love you”.
[注] long 表示“渴望”，属不及物动词，跟宾语时，必须在后面先加介词 for。所以表示“渴望某人做某事”，应该说 long for sb. to do sth.。