

明日、友だちが家にくるよ。
何時に学校にくる?
日本にくる前に、日本語を勉強しました。
"くる(来る)" is in the lesson "Verbs 2" (Level 3), along with 15 other useful words. LinDuo has 180 topic lessons like this one, 2,379 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.