Questions & Answers about Эта лилия белая и очень красивая.
Because лилия is a feminine singular noun, and этот (this) has to agree with the noun it describes.
The forms are:
- этот = masculine
- эта = feminine
- это = neuter
- эти = plural
So:
- эта лилия = this lily
A useful pattern:
- этот цветок = this flower
- эта лилия = this lily
- это растение = this plant
- эти цветы = these flowers
In Russian, many nouns ending in -а or -я are feminine, and лилия follows that pattern.
So:
- лилия ends in -я
- therefore it is usually treated as feminine
Because it is feminine, the words that describe it also take feminine forms:
- эта
- белая
- красивая