Hundreds of people visit the Great Wall every day

the Great Wall is visited by hundreds of people every day

The Great Wall is visited by hundreds of people every day.主动变被动：1.找到谓语动词，本句即visit ，在后面加ed,并跟在BE动词后面 2.找到动作的发出者，即Hundreds of people；动作的承受者，即the Great Wall ，两个调换位置。 3.时间状语不变，即every day。

需注意，标点！！！嘿嘿～

The Great Wall is visited by thousands of people every day

The Great Wall is visited by hundreds of people everyday。