1. "team have" → "team has" — US English: team is singular
2. "week's" → "weeks" — not possessive, plural
3. "beleive" → "believe" — spelling error
4. "its" → "it's" — contraction of "it is"
5. "implementation are" → "implementation is" — singular noun
6. "there is several" → "there are several" — article-verb agreement
7. "cases that needs" → "cases that need" — subject-verb agreement
8. "users gives" → "users give" — subject-verb agreement
9. "it improve" → "it improves" — subject-verb agreement

The team has been working on the feature for three weeks, and we believe that it's almost ready for release. The implementation is mostly complete, although there are several edge cases that need more testing. When users give feedback, they often mention how it improves their workflow significantly.