It is ~ (for...) to do:…がーすることは~だ It is rude to talk on a cell phone on a crowded bus or train. It is difficult for small conpaies to recruit talented young workers.
It is likely/probable that...:…しそうだ It is likely that people weii stop using cash and only use credit cards in the future.
It seems that...:…のように思われる。…だろう It seems that paper books will continue to be more popular than electronic books.