Contrast

1. However.

1. Cars are comfortable. However, they are polluting.

2. On the other hand.

1. Trains are fast. On the other hand, they are not comfortable.

3. But.

1. Cars are comfortable, but with trains there no traffic jams.

Example

1. For example.

1. Cars are comfortable. For example, you can use them whenever you want.

Adition

1. Also.

1. Trains are safe. Also, they are fast.

Sequence

1. First.

1. First, trains are safe. Second, trains are fast.

Conclusion

1. All in all.

1. Cars are fast. Cars are comfortable. All in all, I use cars.

Give opinion

1. I think.

1. I think, the best option are trains.

2. In my opinion.

1. In my opinion, cars are very polluting.