He+took+photos+yesterday改为否定句？
原句：He took photos yesterday.（他昨天照相了。）
改为否定句：He didn't take photos yesterday.（他昨天没有照相。）
take photos
照相，拍照；摄影
近义词：
照相，拍照；摄影
to take a picture , to take a photograph
双语例句：
You can use Huawei mobile phones to take photos.
你可以用华为手机拍照。
For example, people use drones to take photos or make videos.
例如，人们用无人机拍照或制作视频。
I will pick up the rubbish, offer water to the runners and take photos for them.
我将捡起垃圾，给运动员提供水，并为他们拍照。
肯定句改否定句的方法：
1、be动词后加not，诸如：is not(isn't)， are not(aren't)， was not(wasn't)， were not(weren't)， am not（无缩写）。
◆ He is a student. 他是一个学生。--- He is not a student. 他不是一个学生。
◆ They were watching TV then. 那时他们正在看电视。--- They weren't watching TV then. 那时他们没在看电视。
2、情态动词等后加not，诸如：can not(can't)， will not(won't)，should not(shouldn't)，must not(mustn't)，need(needn't)等。
◆ She can take care of herself. 她能照顾好她自己。--- She can not(can't) take care of herself. 她不能照顾好她自己。
◆ You should go home. 你应该回家。--- You shouldn't go home. 你不应该回家。
3、若无法找到be动词或情态动词，就在已有动词前额外加助动词否定形式：don't/doesn't/didn't，同时将动词变原形。
◆ She likes the room. 她喜欢这房间。--- She doesn't like the room. 她不喜欢这房间。
◆ We did our homework yesterday. 我们昨天做了作业。--- We didn't do our homework yesterday. 我们昨天没有做作业。
注：句中若有some ，须将其改成any。
◆ I want some books. 我想要一些书。--- I don't want any books. 我不想要任何书。
◆ There is some water in the cup. 杯子里有一些水。--- There isn't any water in the cup. 杯子里没有水了。
