1. There are several reasons for…, but in general, they come down to three major ones.
2. There are many factors that may account for…, but the following are the most typical ones.
3. Many ways can contribute to solving this problem, but the following ones may be most effective.
4. Generally, the advantages can be listed as follows.
5. The reasons are as follows.
1. Because/Since we read the book, we have learned a lot.
2. If we read the book, we would learn a lot.
3. We read the book; as a result / therefore / thus / hence / consequently / for this reason / because of this, we’ve learned a lot.
4. As a result of /Because of/Due to/Owing to reading the book, we’ve learned a lot.
5. The cause of/reason for/overweight is eating too much.
6. Overweight is caused by/due to/because of eating too much.
7. The effect/consequence/result of eating too much is overweight.
8. Eating too much causes/results in/leads to overweight.