Forms
Bootstrap has it's own custom form styles for consistent display accross browsers
Basic Form
form-label
form-control
form-text
The form tag itself has no special container class since form elements can be used in other elements without a form tag., but for other elements you should use Bootstrap classes to take advantage of the styling.
form-label goes on the labels
form-control goes on input fields and other form elements
form-text - goes on text that you want to be part of the form as information. You can use the aria-describedby class that is tied to this help.
Other than these fields, make sure you add the proper inputs and create the forms as you normally would in HTML.