Questions & Answers about Sie spannt das Tuch über den Tisch.
Here it means she.
Why?
- spannt is 3rd person singular
- she
- spannt fits
- they would be sie spannen
- formal you (Sie) would also be Sie spannen
So even though Sie is capitalized, that is just because it is at the beginning of the sentence. The verb form tells you it must be she.
The infinitive is spannen.
In this sentence, spannt is:
- 3rd person singular
- present tense
- from the regular verb spannen
Common meanings of spannen include:
- to stretch
- to tighten
- to pull taut
In this sentence, stretch / spread taut is the best fit.