Sure, here are 5 sentence starters that use the conjunction "although":

1. Although it was raining heavily, we decided to go for a walk in the park.
2. Although she studied hard for the exam, she didn't perform as well as she had hoped.
3. Although the restaurant had great reviews, the food was disappointing.
4. Although he was tired, he stayed up late to finish his work.
5. Although they had never met before, they instantly hit it off.
Spojení: I když
1. I když jsem měl své pochybnosti, rozhodl jsem se to zkusit.
2. I když to vypadalo nemožné, byl jsem odhodlán uspět.
3. I když jsem znal rizika, šel jsem dál.
4. I když jsem se bál, pokračoval jsem.
5. I když byly šance proti mně, bojoval jsem až do konce.