バスで行（い）く。

バスで学校（がっこう）に行（い）く。

自転車（じてんしゃ）でいいです。

自転車（じてんしゃ）で。

電車（でんしゃ）で来（き）ますか。

タクシーでいいですか。

車（くるま）で病院（びょういん）に行（い）く。

バスで帰（かえ）る。

自転車（じてんしゃ）で学校（がっこう）に行（い）く。

バスで行（い）くかタクシーで行（い）くか分（わ）かりますか。

新幹線（しんかんせん）で東京（とうきょう）へ行（い）く。

飛行機（ひこうき）で帰（かえ）る。

<div class='writeup-body'>で is a particle that has several different uses in Japanese. At its core, it is always used to highlight something that is 'required' to perform some sort of action/reach some kind of goal. One of these uses relates to 'things'. This comes across as 'by' or 'with' in English.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>車（くるま）で空港（くうこう）へ行（い）く。</div><div class='writeup-example--english'>I go to the airport by car. (Required to reach a goal)</div></li><li class='writeup-example'><div class='writeup-example--japanese'>電車（でんしゃ）で行（い）く。</div><div class='writeup-example--english'>I go by train. (Required to reach a goal)</div></li></ul>In these sentences, the item is considered essential for the action to be performed. While other items may be used, で simply highlights the one that was chosen. で is also used when groups of people perform actions together, this is something that many people learning Japanese have trouble with initially (because と may also be used as 'with' for people). However, the use of で is actually the same as this by/with, meaning that the speaker considers the group as the tool used for performing the action.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>みんなでレストランに行（い）く。</div><div class='writeup-example--english'>I go to the restaurant with everyone. (Being with everyone is what allows/gives purpose to the action)</div></li> <li class='writeup-example'><div class='writeup-example--japanese'>来年（らいねん）は皆（みんな）でハワイに行（い）く。</div><div class='writeup-example--english'>I will go to Hawaii with everyone next year. (Being with everyone is what allows/gives purpose to the action)</div></li> </ul>The difference between と and で as 'with', is that で is used when everyone in the group has the same objective/end goal. と is used when each person is performing the action toward each other, not toward an external objective.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>家族（かぞく）全員（ぜんいん）で沖縄（おきなわ）へ行（い）く。</div><div class='writeup-example--english'>I will go to Okinawa with everyone in my family. (Being with everyone is what allows/gives purpose to the action)</div></li><li class='writeup-example'><div class='writeup-example--japanese'>お母（かあ）さんとご飯（はん）を食（た）べる。</div><div class='writeup-example--english'>I eat with my mom. (Being together is the objective, eating is just what is happening while being together)</div></li></ul></div>

Grammar Info

で

With, By (using)