1.If I (were / is ) a rich man, I (would / will ) buy a big house.
2.If I ( had / have ) enought money, I (would / will ) travel in Japan.
3. If there (was / is ) a fire, we ( would / will ) dial 999.
4. If a fire (broke / break ) out in the next building, I (would / will )
dial 999.
代為解釋.
更新1:
可吾可以用中文解釋,1&2都是有錢點解1(were)2(have),3&4都是火災點解1(is)2(broke) thahk you.