He will come next Monday. 改為一般疑問句是：

Will he come next Monday?

will 是表示將來時態的助動詞，可以將will提到句首變成一般疑問句。例如：

1. You will pay a visit to the Science Museum when you are free.

Will you pay a visit to the Science Museum when you are free?

2. They will get together this weekend.

Will they get together this weekend?

這個句子是一個一般將來時的句型，而且是陳述句的肯定形式，句子意思是說他將於下周一來。要把它改成一般疑問句形式，需要把助動詞will提前到句首，其他成份不變，句末加問號即可。因此原句的一般疑問句形式就是Will he come next Monday？