勿
=
丿
+
勹
:
Mnemonic symbol from the shape of the character: bat wings. The 丿 strokes look like the fingers of a single bat wing.
The elephant (勹) wants to eat a banana (丿) in the space station's bathroom (Ø4), but Willy Walrus (w) suddenly flies by (using bat wings (勿)), snatches the banana away and shouts "do not!" (勿)
once / already / ever (in the past) / former / previously / (past tense marker used before verb or clause)
曾
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丷
+
囗
+
⺌
+
曰
:
Mnemonic symbol: I think 曾 just looks like a firefly, with the head (with two feelers) at the top and the glowing body at the bottom.
The firefly is selling aloe vera out of a big wooden box in the kitchen of the Erechtheion. With a big microphone it is advertising the aloe. As it sees a mean crocodile and the King of Chu starting a big fight for the aloe, the firefly is very excited and states that it has never ever seen something like this before.