[译] 我要求约翰立即到那儿去。
[误] I demanded John to go there at once.

[正] I demanded that John (should) go there at once.
[注] 看到 demand 容易让人联想到 want, ask，于是生出“demand sb. to do”这样的结构来。demand不能接“宾语+不定式”，而接 that 从句，且从句中的谓语动词应用“(should)+动词原形”。