Understanding the difference between 'et' and 'kuna' is crucial for B1 exam success in Estonian. 'Et' means 'that' and is mainly used to introduce subordinate clauses. For example, 'Ma tean, et ta tuleb' translates to 'I know that he is coming'. It's a straightforward way to convey information. 'Kuna', on the other hand, means 'because' and provides a reason for something. 'Ma ei tule, kuna olen väsinud' means 'I am not coming because I am tired', clearly explaining the reason.
Another example with 'et': 'Ta ütles, et ilm on ilus' — 'He said that the weather is nice'. And with 'kuna': 'Ma jään koju, kuna sajab vihma' — 'I am staying home because it's raining'. One mistake learners often make is using 'et' to mean 'because', which can confuse the listener or reader. For instance, 'Ma ei tule, et olen väsinud' would be incorrect in this context.
To practice, try writing a few sentences using both 'et' and 'kuna', then check them with a language partner or on a platform like https://keelix.ee/modules. It’s a valuable exercise to refine your understanding.