Что значит "She would live in London."
"She used to live in London."
"she had lived in London." ?

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"She used to live in London." and "She had lived in London." (This phrasing is a bit awkward), are both forms of past tense speech implying the subject, she, lived in London at one point but no longer does. "She would live in London." is also a bit ambiguously phrased but implies her desire to live in London. Typically we would say, "She wants to live London." to Express her desire, "She will live in London." (future tense) to indicate she absolutely will be doing as such, and "She lived in London." (past tense) indicating her history of having once already lived there.