This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ Remember that non-specific time words like ‘昨日（きのう）’ do not need to be marked with a particle. We arrive at this answer:
私は昨日忙しかったです。
わたしはきのういそがしかったです。

This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ Remember that non-specific time words like ‘昨日（きのう）’ do not need to be marked with a particle. We arrive at this answer:
私は昨日忙しかったです。
わたしはきのういそがしかったです。

This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ We arrive at this answer:
宿題は難しかったです。
しゅくだいはむずかしかったです。

This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ We arrive at this answer:
宿題は難しかったです。
しゅくだいはむずかしかったです。

This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ We arrive at this answer:
私の部屋はきれいじゃなかったです。
わたしのへやはきれいじゃなかったです。

This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ We arrive at this answer:
私の部屋はきれいじゃなかったです。
わたしのへやはきれいじゃなかったです。

This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ Remember that the word ‘いい’ conjugates irregularly. We arrive at this answer:
天気は良かったです。
てんきはよかったです。

This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ Remember that the word ‘いい’ conjugates irregularly. We arrive at this answer:
天気は良かったです。
てんきはよかったです。

This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ We arrive at this answer:
旅行は楽しくなかったです。
りょこうはたのしくなかったです。

This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ We arrive at this answer:
旅行は楽しくなかったです。
りょこうはたのしくなかったです。

In Chapter 5, you learned to use the word ‘切符（きっぷ）’ to mean ‘ticket,’ but you will also hear the English-derived word ‘チケット’ frequently. ‘切符’ is used almost exclusively to refer to travel tickets, for things like trains or planes, whereas ‘チケット’ is more generally used for any kind of entry ticket, such as for a movie or a stage play.
This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ We arrive at this answer:
切符は高くなかったです。
きっぷはたかくなかったです。

In Chapter 5, you learned to use the word ‘切符（きっぷ）’ to mean ‘ticket,’ but you will also hear the English-derived word ‘チケット’ frequently. ‘切符’ is used almost exclusively to refer to travel tickets, for things like trains or planes, whereas ‘チケット’ is more generally used for any kind of entry ticket, such as for a movie or a stage play.
This question will use a standard ‘XはYです/でした’ construction, with an adjective in the past tense instead of a noun after ‘Y.’ We arrive at this answer:
切符は高くなかったです。
きっぷはたかくなかったです。