Grammar exercise 2 of 3 语法练习2
Use 的、了、地 as “Video lesson: Four big rules for Chinese grammar (语法 yǔfǎ)” explains it, through 11 items over 6 of its example sentences: fill the gap where the word was taken out, and put the words of each sentence back in order.
Video lesson: Four big rules for Chinese grammar (语法 yǔfǎ)
11 items. Each one you miss comes back later in the same sitting.