thunderstorms

"We canceled the school picnic when we saw a large cumulonimbus forming in the sky, because those clouds often bring thunderstorms. "

"The accompanied minor was nervous about flying alone, but a flight attendant stayed with him until takeoff. "

"The factory produced 1000 cars last week. "

"The lake froze solid."

"Except for one or two days a year, he usually walks to work."

"My sometimes neighbor, a retired teacher, still visits the school occasionally. "

"The project consists of three main parts. "

"Thunder is preceded by lightning."

"The weather forecast predicted rain for tomorrow, so I will bring an umbrella. "

"The weather forecast predicts rain tomorrow. "

"She cancelled the incorrect answer on the test with a thick black line. "

"Although we did not see the lightning, we did hear the thunder."