| I | discolour |
|---|---|
| you | discolour |
| he/she/it | discolours |
| we | discolour |
| you | discolour |
| they | discolour |
| I | discoloured |
|---|---|
| you | discoloured |
| he/she/it | discoloured |
| we | discoloured |
| you | discoloured |
| they | discoloured |
| I | have | discoloured |
|---|---|---|
| you | have | discoloured |
| he/she/it | has | discoloured |
| we | have | discoloured |
| you | have | discoloured |
| they | have | discoloured |
| I | had | discoloured |
|---|---|---|
| you | had | discoloured |
| he/she/it | had | discoloured |
| we | had | discoloured |
| you | had | discoloured |
| they | had | discoloured |
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单语范例（未经PONS编辑处理）
There were extensive signs of discolouring, which seemed to indicate extensive bruising.
en.wikipedia.org Over time, the standard weld metal is expected to discolour and corrode at a different rate to the weather resistant steel.
www.architectureanddesign.com.au Sterling silver and pewter will oxidize and discolour from the heat.
en.wikipedia.org The exposed surfaces of products may then discolour and crack, and in extreme cases, complete product disintegration can occur.
en.wikipedia.org This was originally a practical application which prevented the bishop's hand from sweating and discolouring (or being discoloured by) the metal.
en.wikipedia.org