English Vocabulary tips & definition with Gymglish.
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to fill (in, out, up): to make, to become full; to use empty space
Fill is always followed by a "post-position":
To fill out a form To write the necessary information on a document
To fill in the hole To put things into the hole to make it full, so that there is no more space
To fill up the gas tank. To put petrol/gas into your car so the gas tank becomes full
(The bag) is filled with (sand): (The bag) is full of (sand)

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