To avoid last-minute problems, we must preplan every step of the presentation.

We followed the preplanned route to avoid construction delays.

We preplanned the route to avoid the flooded roads.

She was preplanning the conference months before any speakers were booked.

The success of the event depended on careful preplanning by the entire team.

She preplans every detail of the conference to avoid surprises.

We preplanted the greenhouse beds before the seed shortage, so the plants were ready earlier than usual.

They are preplanting young saplings along the riverbank to stabilize the soil before the rainy season.

Astronomers used infrared telescopes to study the complex dust shells surrounding several preplanetary nebulas.

Astronomers observed a group of preplanetary nebulae to trace how dying stars shed their outer layers before becoming planetary nebulae.