

She lectures on history at the local university.
[ˈʃi ˈlɛktʃərz ˈɔn ˈhɪstəri ət ðə ˈloʊkəl ˌjunəˈvɜrsəti.]
Who is lecturing on economics this afternoon?
[ˈhu ˈɪz ˈlɛktʃərɪŋ ˈɔn ˌɛkəˈnɑmɪks ˈðɪs ˌæftərˈnun?]
He has lectured all over Europe.
[hi ˈhæz ˈlɛktʃərd ˈɔl ˈoʊvər ˈjʊrəp.]
"lecture" is in the lesson "Verbs 14" (Level 26), along with 10 other useful words. LinDuo has 180 topic lessons like this one, 2,375 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.