diff --git a/moderngl_window/context/base/keys.py b/moderngl_window/context/base/keys.py
index 8fad555..c5e05b7 100644
--- a/moderngl_window/context/base/keys.py
+++ b/moderngl_window/context/base/keys.py
@@ -36,6 +36,9 @@ class BaseKeys:
     RIGHT: Any = "undefined"
     UP: Any = "undefined"
     DOWN: Any = "undefined"
+    LEFT_SHIFT: Any = "undefined"
+    RIGHT_SHIFT: Any = "undefined"
+    LEFT_CTRL: Any = "undefined"
 
     TAB: Any = "undefined"
     COMMA: Any = "undefined"
diff --git a/moderngl_window/context/pygame2/keys.py b/moderngl_window/context/pygame2/keys.py
index 737256d..5094ac7 100644
--- a/moderngl_window/context/pygame2/keys.py
+++ b/moderngl_window/context/pygame2/keys.py
@@ -21,6 +21,9 @@ class Keys(BaseKeys):
     RIGHT = pygame.K_RIGHT
     UP = pygame.K_UP
     DOWN = pygame.K_DOWN
+    LEFT_SHIFT = pygame.K_LSHIFT
+    RIGHT_SHIFT = pygame.K_RSHIFT
+    LEFT_CTRL = pygame.K_LCTRL
 
     TAB = pygame.K_TAB
     COMMA = pygame.K_COMMA
diff --git a/moderngl_window/context/pyglet/keys.py b/moderngl_window/context/pyglet/keys.py
index 399e1b0..62f44b1 100644
--- a/moderngl_window/context/pyglet/keys.py
+++ b/moderngl_window/context/pyglet/keys.py
@@ -28,6 +28,9 @@ class Keys(BaseKeys):
     RIGHT = key.RIGHT
     UP = key.UP
     DOWN = key.DOWN
+    LEFT_SHIFT = key.LSHIFT
+    RIGHT_SHIFT = key.RSHIFT
+    LEFT_CTRL = key.LCTRL
 
     TAB = key.TAB
     COMMA = key.COMMA