High-quality PDFs often use color-coding to distinguish between verbs, nouns, and particles, making grammar less intimidating.
The Quran contains approximately 77,430 to 80,000 total words. However, many of these are repetitions of a core set of unique vocabulary. Statistical analysis shows that just form the vast majority of the linguistic tokens used across all 114 surahs.
Seeing the word used in a specific ayah (verse) helps cement the meaning in memory.