The first thing you have to do if you wish to create an online form, is to place a few online form "fields" onto your page.

You will find these form fields under the Insert menu.

These form fields are also (more conveniently) available on the "Form Tools" toolbar. To get the forms toolbar, click on the line that appears at the top of the form field menu, and drag the menu out onto your page...

The following sample shows some of the properties of a form, for example, a one-line text box, some radio buttons, a drop-down menu, check boxes and a scrolling text box. 

All you have to do is choose from the toolbar which element you want in your form, and it appears in a Form Field (represented by the dotted lines).

The form field appears automatically, together with Submit and Reset buttons, when you insert your first element.

You may choose to use a table to make sure all these elements line up the way you want them to. 

If you decide to use a table, insert it into the form field... don't try to insert the form field into it.

In other words, create the form field first, and then put the table inside it.