Knees

Knees can be thrown outside of a clinch (unsupported) or from a clinch (supported). I'll likely move the supported knees to the clinch section. 

I. Types of Knees

There are essentially two types of unsupported knees. The straight knee & the diagonal knee. 

Straight Knee

A straight knee is one that is thrusted forward, usually to the opponents body. *example

Diagonal Knee

A diagonal knee is one that is thrown at an angle similar to that of a round kick. *example

II. Footwork

The footwork option with knees are similar to those with the round kick. 

III. Guard

Unsupported/Cross Guard - The knee is unsupported in that you are not clinched with your opponent. Initiated at a longer distance. The arm opposite the knee you are throwing forms a single cross guard over your face. 

*Damien Trainor Long Guard Knee

Supported Knee

A Knee executed from a momentary clinch position.

Examples:

-Supported/Cross Tie - The knee is supported by a momentary cross tie/frame clinch with your opponents neck. This arm configuration serves to temporarily keep your opponent from retreating back (the hand behind their neck), keep them from effectively clinching with you (your forearm), and provides some protection against strikes. 

-Supported/Double Wrist - Grab both of your opponents wrist and pull them down and into the knee. The wrist grip and be with or without use of the thumbs. Without thumbs the move resembles a double jut sao from Wing Chun. 

*Jeff Chan Example