When you want to combine objects in Illustrator, you can do so by using the Object menu. This menu contains a variety of options that allow you to combine objects in a way that is convenient for your work. One option that you can use is the Combine button. This button allows you to combine two or more objects into one. You can also use this button to join two or more objects together, if they are of different sizes. Another option that you can use is the Pathfinder tool. This tool allows you to create lines and shapes with ease. You can also use this tool to create curves and other shapes. If you want to combine objects in a way that is more complex, then you can use the Polygonal tools. These tools allow you to create polygons with ease. You can also use these tools to create circles, squares, and other shapes.