He has taken French leave.

He is taking French leave.

He took French leave and left the party without saying goodbye.

He leaves no stone unturned in his search for the truth.

She is leaving no stone unturned in her search for a new job.

The new company's innovative technology has left its competitors in the dust.

The broad-leaved ragwort is a flowering plant native to North America.

The silver-leaved bloodwood is a native Australian tree.

I found a four-leaved clover in the garden.

I found four-leaved clovers in the field.