

Don't walk on the grass.
[ˈdoʊnt ˈwɔk ˈɔn ðə ˈɡræs.]
The grass is wet this morning.
[ðə ˈɡræs ˈɪz ˈwɛt ˈðɪs ˈmɔrnɪŋ.]
Let's sit on the grass.
[ˈlɛts ˈsɪt ˈɔn ðə ˈɡræs.]
"grass" is in the lesson "Plants" (Level 29), along with 11 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.