曾幾何時

曾 = 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.

何 = 亻 + 可 : Mnemonic symbol (from "carry"): baby sling

何 = 亻 + 可 : In the elevator's kitchen, Rosa Luxemburg picks up the crying baby Hamlet from his bed of nails, puts him in his baby sling and tries to calm him down.

时 = 寸 + 日 : Mnemonic symbol: a giant pocket watch.

The sun (日) asks Sherlock Holmes (sh) out for a coffee in the space station's kitchen (Ø2). Looking at his pocket watch (时), Sherlock sees he has time, winks and "thumbs up" (寸).