YOU SAID:

the general will be arriving

INTO JAPANESE

将軍が到着します

BACK INTO ENGLISH

The generals are arriving

INTO JAPANESE

将軍が到着しています

BACK INTO ENGLISH

The generals have arrived

INTO JAPANESE

将軍が到着しました

BACK INTO ENGLISH

The general has arrived

INTO JAPANESE

将軍が到着しました

BACK INTO ENGLISH

The general has arrived