The leaves are about to fall but they haven't yet fallen.

这些叶子似坠非坠。

耶鲁公开课 - 弥尔顿课程节选

If these trees are still supplying shade, embowering the entire valley of Vallombrosa, the leaves haven't all fallen, of course.

如果这些树仍在为热门提供遮蔽，将整个村庄掩盖在树荫之下，这些叶子当然就还未凋落。

耶鲁公开课 - 弥尔顿课程节选

Some decision makers in the music business believe the network's music site hasn't fallen far enough from the tree.

WSJ: The Improbable Rise of NPR Music

"No matter how you slice it or dice it, the consumer hasn't fallen out of bed, " said Bernie Williams, vice president of discretionary money management at USAA Investments.

WSJ: U.S. Stocks Pull Back

They haven't fallen quite as quickly as crude prices.

NPR: Why Are Oil Prices Sinking So Quickly?