To be candid with you, your son is far from trust worthy.

对你老实讲, 你儿子。

You can't gamble on the weather in England.

英国天气。

You can't rely on the weather.

天气。

He is a dubious character.

他一个人。

His excuse was not valid.

他借口。

He’s a rather shady person.

他个相当人。