并列句中的时态没有什么特别规定，只需根据具体的语境需要来确定即可，如：

Do you want a bath at once, or shall I have mine first? 是你马上洗澡，还是我先洗？

The decision has been made, and we must all abide by it. 决定已经作出，我们必须遵守。

The weather had been rainy for days, and the day of the race was no exception. 天一直下雨，比赛那天也不例外。

She fled the country, and is now seeking asylum inSweden. 她逃离了该国，目前正在瑞典寻求庇护。

The fields had been ploughed, and there was nothing but bare earth to be seen. 田地刚刚犁过，一眼望去只有光秃秃的土地。

They bought a dilapidated house when they got married, and are gradually doing it up. 他们结婚时买下一座破旧的房子，如今正在逐步整修。

Today is the hospital’s fiftieth anniversary, and there will be a party to mark the event. 今天是医院建院50 周年，将会举行晚会来庆祝。

Flight times in the brochure are based on our best estimate, and will be confirmed as soon as possible. 小册子里的航班时间是尽可能准确的估计，会尽快确认。