1. "I saw her duck" (verb): This means that the speaker witnessed a person (her) performing the action of ducking, likely bending down or lowering their head.
2. "I saw her duck" (noun): This means the speaker saw a duck that belonged to a woman (her).
The ambiguity arises because the word "duck" can function as both a verb (to duck) and a noun (a type of bird). Without further context, it's impossible to determine which meaning the speaker intended.
To resolve the ambiguity, you would need additional information. For example:
* If the speaker is talking about a game of hide-and-seek: "I saw her duck behind the couch." This clarifies that "duck" is a verb.
* If the speaker is describing a scene at a pond: "I saw her duck swimming in the water." This clarifies that "duck" is a noun.