下列句子表达对吗？

1.是不对的 应该是 there is a dolphin in the picture
2.fish要加es的 还有类如 wash watch . and so on
3.he could performance well
4.he could jump high.

1.这是错的。应该是there is a dolphin in the picture.
2题是对的。fish是指鱼这一类，并不是特指哪些鱼。
3。 he can give a performance.
4.he can jump high

不对,应该是 there is a dolphin in the picture
对的,fish是指鱼这一类，并不是指各种各样的鱼
he can give a performance.
he can jump high