Page 426 - Basic Japanese

Moshi intānetto to denwa no keiyaku o onaji kaisha to

shite denwa no sābisu ga kirai dattara, dō shimasu ka.
If you signed a contract with a company for both
Internet and telephone and you disliked their

phone service, what would you do?

Here are some sentences illustrating the difference

between A) the conditional meaning ‘when,’ with emphasis
on what happened at the time; B) plain imperfect or perfect
+ toki (ni) meaning ‘when, at the time that,’ with emphasis

on the time that something happened; and C) plain
imperfect + to ‘whenever,’ a general condition, with a

repeated or habitual conclusion.

Hahaoya ga sattara, kodomo wa nakimasu.
When (or if) the child’s mother leaves, he will

cry.

Hahaoya ga saru toki ni, kodomo wa nakimasu.

When the child’s mother leaves, he will cry.

Hahaoya ga satta toki ni, kodomo wa nakimasu.
When the child’s mother has left, he will cry.

Hahaoya ga saru to, kodomo wa nakimasu.
When(ever) the child’s mother leaves, he cries.