Birds flew up into the sky.
Meaning: This sentence describes how birds moved from the ground or a lower position into the higher part of the atmosphere, using their wings.
Choice of Words: Flew is the past tense of the verb fly, which means to move through the air with wings. Up means in a direction that is higher. Into means to enter or move inside something. Sky is the part of the atmosphere that is above the Earth.
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Related Expressions