Draw the resonance structures for the following compounds. Show the electron shift using curved-arrow notation.
`CH_3 CH=CHCHO`

Explanation

To draw the resonance structures for the compound CH₃CH=CHCHO, we will follow these steps:

### Step 1: Identify the structure of the compound
The compound CH₃CH=CHCHO can be represented as follows:
- The first carbon (C1) is connected to three hydrogens (H) and to the second carbon (C2).
- The second carbon (C2) is connected to one hydrogen (H) and to the third carbon (C3) via a double bond.
- The third carbon (C3) is connected to the fourth carbon (C4) via a single bond and to an oxygen (O) with a double bond, which is also connected to a hydrogen (H).

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