The past continuous is used to portray an action in progress as the background to an interrupting foreground event expressed in the past simple. The past continuous is generally placed in a while -clause or an as -clause (sometimes a when -clause). This is one of the most typical grammatical patterns in English.
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The past continuous is used to portray an action in progress as the background to an interrupting foreground event expressed in the past simple. The past continuous is generally placed in a while-clause or an as-clause (sometimes a when-clause). This is one of the most typical grammatical patterns in English.
Just as I was leaving home for school, the