汤姆肯定一直在打篮球，丽丽一直在写作业。

Tom must have been playing basketball and Lily (must have been)doing her homework.

youdao

汤姆肯定一直在打篮球，丽丽一直在写作业。

Tom must have been playing basketball and Lily (must have been)doing her homework.

youdao