Lewis structure and resonance forms for CH3NCS

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MG5
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I need to write the lewis dot structure along with the 3 resonance forms for CH3CNS. This is what I had but it was wrong. Not sure what to do. Thanks.

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Resonance forms do not involve the movement of nuclei, so 2 and 3 are wrong. Actually, 3 is a different compound altogether. Perhaps consider pushing the lone pairs on the sulfur and nitrogen on structure 1