How to take clear pictures of landscapes and people in the frame?

The aperture is too large, resulting in insufficient depth of field to cover the scene behind. It is recommended to reduce the aperture to f11-f16. You should be using a Nikon system, right? AF-S, single focus, the default is focus priority, that is It must be in focus (with a beep) before pressing it. It is usually used with single-point focus, which is suitable for static scenes. It is used when the focus point is clear, such as AF-C for static portrait photography, continuous focus, and the default is shutter release priority. That is to say, you can press the shutter regardless of whether the focus is in focus. It is usually used with full-area or partial-area autofocus. It also adds a continuous shooting function to enhance the probability of accurate focus. It is suitable for shooting dynamic subjects, such as running. Children, dogs... AF-A, the system automatically determines the behavior of the subject. Take taking pictures of children as an example. When the child is not moving, it will use AF-S to shoot. Once it runs, it will switch to AF-C mode to shoot. , usually used by beginners or lazy people