That is a good idea.(那是個好主意。)

It is a good idea to place your order well in advance as delivery can often take months rather than weeks.(早早提前訂購是個好主意，因為交貨常常要花幾個月的時間，而不是幾星期。)

Honey, I don't really think that's a good idea.(親愛的，我不認為那是個好主意。)

Good idea! I love parties.(好主意！我喜歡聚會。)

Good idea. Good morning, class.(好主意！同學們，早上好！)

Mmm, I'm not so sure that's a good idea.(嗯，我不知道這想法行不行。)

It seems like a good idea on the surface but there are sure to be problems.(這主意乍一看不錯，但肯定存在問題。)

"Why?" Pete asked impatiently.—"Yes, why?" Bob chimed in. "It seems like a good idea to me."(“為什么？”皮特不耐煩地問。—“是啊，為什么？”鮑勃插嘴說。“在我看來這好像是個好主意。”)

It is not a good idea to fight fatigue by taking stimulants.(服興奮劑來抗疲勞不是個好主意。)

It would be a good idea to call before we leave.(我們出發(fā)之前打個電話是個好主意。)