1) They want to help a man, as well as his wife, who may be related to them.
Who is related to them? The man, his wife, or both of them?
2) A man, as well as his wife, who had worked for us, left for another country.
Who had worked for us? The man, his wife, or both of them?
Gratefully,
Navi.
English isn't the most exact of languages. In this case the problem is that who as a relative pronoun can refer to both singular and plural antecedents. It is common for a relative to refer to the word it follows.
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English isn't the most exact of languages. In this case the problem is that who as a relative pronoun can refer to both singular and plural antecedents. It is common for a relative to refer to the word it follows. If we assume that is the case in your sentences, too, who refers to his wife only.
CB