Definition: to feel uncertain about something or to think that something is not probable Level: B2
我怀疑自己能否按时完成工作。
I ___doubt whether I can finish the work on time.
我怀疑自己能得到那份工作。
I ___doubt that I'll get the job.
他说他会帮忙，但我对此表示怀疑。
He said he'd help, but I ___doubt it.
