Adding tms

I tried adding tms layer using below code:

var viewer = new Cesium.Viewer(‘cesiumContainer’, {

imageryProvider : new Cesium.createTileMapServiceImageryProvider({

url : 'tif_conv/tif_conv’

}),

baseLayerPicker : true

});

Im able to add the tms but im not getting the base map.How to add a tms layer with basemap.I have attached the screenshot of my result.

The imagery layers example shows you how to have multiple layers. So you can have the base map first then add your map layer: