In addition
も~ば~も
N1 + も +
V (ば)
い-Adj い ければ
な-Adj + なら
N + なら
+ N2 + も
Means “also”, “as well”. Means that both N1 and N2 are true (and should share a connection). ⚠ Despite using conditional form, it is not conditional in meaning.
Examples
母はポルトガル語もできればスペイン語も話せる。 My mother can speak Portuguese as well as Spanish.
おまけに
Means “in addition”. Used for emphasis for similar qualities (positive, negative). Used orally.
Examples
暑くておまけにエアコンが壊れてしまった。 It was hot, and to make matters worse, the air conditioning broke.
しかも
Means “moreover”, “what’s more”. Talks about a same subject, for objective information, implying that A and B exist at the same time. It is similar to おまけに, but used for writing.
Examples
このレストランはとても美味しいね。しかも、安いよ! This restaurant is delicious. What’s more, it’s cheap!
上に
V
い-Adj
な-Adj + な
N + の
+ 上(に)
上に means “and also”, “in addition”, “as well”. Used with similar qualities (positive with positive, negative with negative).
Examples
この家は狭い上に家賃は高すぎる。 This house is small, and the rent is too expensive.
その上
その上 means “besides”, “in addition”. Means the same as 上に, but with two separate sentences.
Examples
この家は狭い。その上、家賃は高すぎる。 This house is small. In addition, the rent is too expensive.
に加えて
に加えて means “in addition to”. It is formal, and often used in business settings. Used with nouns.
Examples
今年はピンポンに加えてバドミントンを教えます。 This year, I’ll be teaching badminton in addition to ping pong.
Not only, but also
はもちろん
N
+ はもちろん +
phrase
+ も・さえ
Means “not only but also”, “not to mention”. The most common form.
Examples
このゲームセンターにはゲームはもちろんボウリングもあります。 This game center not only has games but also bowling.
はもとより
Means “not only but also”. Similar meaning than はもちろん. Conveys a sense of continuity. Used mostly in writing. Used with nouns.
Examples
雪が多いので、電車はもとよりタクシーもない。 There is so much snow that there are no trains, let alone taxis.