问题描述：
He has rung me up four times .He began to ring me at 11:00.(用since 合并句子)
It rains .I go to the park .(用 if将两句连成一句合乎逻辑的话)
The government forbade drinking two years ago .(改为被动语态）
It rains .I go to the park .(用 if将两句连成一句合乎逻辑的话)
The government forbade drinking two years ago .(改为被动语态）
问题解答：
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