1.He played soccer with friends.I watched that I watched him... 2.Mai stayed up late last night ,so she is tired now If... 3.I had written a letter to my sister .I went to bed(using the perfect participle) 4.Her brother left the case here,but he didn't say anything to her(using the gerund)

1.I watched him play soccer with friends.

2.If Mai hadn't stayed up late last night, she wouldn't be tired now.

3.Having written a letter to my sister, I went to bed.

4.Her brother left the case here saying nothing to her.

1. I watched him play soccer with his friends.

2. If Mai hadn't stayed up late last night, she wouldn't have been tired now.

3. Having written a letter to my sister, I went to bed.

4. Her brother left the case here without saying anything to her.