私
In 私の, 私 identifies the speaker as the owner, so the phrase means “my.” This form can also refer to “I” when the speaker is the topic or subject.
の
In 私の and あなたの, の shows who something belongs to, meaning “my” or “your.” In ジャケットの下, it connects ジャケット with the area below it.
バッグ
バッグ means “bag” here, the item being checked and closed. A useful pattern is バッグを確認する, meaning to check a bag.
を
を marks the thing directly involved in an action. In バッグを確認して and 中を見ます, it marks the bag being checked and the inside being looked at.
一緒
In 一緒に, 一緒 gives the meaning “together.” It describes checking or looking through the bag with another person, and 一緒に + an action is a reusable pattern.
に
In 一緒に, に connects 一緒 with the action and gives the meaning “together.” In 下に and ここに, it marks the location of something.
確認して
確認して means “check” here and is the て-form of 確認する. It connects the checking action to くれますか in the polite request 確認してくれますか.
くれます
In 確認してくれますか, くれます presents the checking as a favor done for the speaker. The reusable request pattern 〜てくれますか asks someone politely to do something for you.
か
At the end of 確認してくれますか and 分かりますか, か marks the sentence as a question. It turns the request or question into a polite question.
中
In 中を見ます, 中 means “inside,” referring to the inside of the bag. The pattern 中を見ます means to look inside.
見ます
In 中を見ます, 見ます means “look at” or “look through” the inside. It is the polite form of 見る, and Xを見ます is a reusable pattern for looking at X.
何か
In 何か足りないもの, 何か means “anything” or “something.” 何 refers to what, and the following か makes it an indefinite expression; together, the phrase asks whether anything is missing.
足りない
In 足りないもの, 足りない describes something that is not present in sufficient amount, so it refers to something missing. A reusable pattern is Xが足りない, meaning that X is not enough.
もの
In 足りないもの, もの means “thing,” making the phrase “things that are missing.” It can refer to an item or items in a general way.
が
In 足りないものがある, が marks 足りないもの as the thing whose existence is being considered. The pattern Xがある says that X exists or is present.
ある
In 足りないものがある, ある means “there is” or “there are,” referring to the existence of missing items. Xがある is a reusable way to say that something exists or is present.
分かります
In 分かりますか, 分かります means “understand” or “be able to tell”; here it asks whether the listener can tell if anything is missing. It is the polite form of 分かる, and 〜が分かりますか asks whether someone can tell or understand something.
あなた
In あなたの, あなた refers to the person being addressed, so the phrase means “your.” It identifies that person as the owner of the wallet, phone, or jacket.
財布
財布 means “wallet” here, one of the two items confirmed to be in the bag. A useful pattern is 財布があります, meaning that a wallet is present.
と
In 財布と携帯電話, と connects the two listed items and means “and.” It is used between nouns when naming items together.
携帯電話
携帯電話 means “mobile phone” here, the second item confirmed to be in the bag. It appears in the list 財布と携帯電話, where two belongings are named together.
は
In あなたの財布と携帯電話は, は marks the wallet and phone as the topic of the statement. The sentence then gives information about where those items are.
どちら
In どちらも, どちら refers to the two items just mentioned. With も, the expression means “both,” rather than asking which one.
も
In どちらも, も adds the meaning “both,” showing that the statement applies to each of the two items. It follows どちら to form the expression “both of them.”
ここ
In ここにあります, ここ means “here,” the place where the wallet and phone are located. ここに is a reusable way to point out that something is in this place.
あります
In ここにあります, あります means “is” or “are located,” referring to the wallet and phone. It is the polite form used with the location pattern Xにあります.
小さな
In 小さなノート, 小さな describes the notebook as “small.” The reusable pattern 小さな + noun places this description directly before the noun.
ノート
ノート means “notebook” here, specifically the small notebook being searched for. It appears in the location question 私の小さなノートはどこですか.
どこ
In どこですか, どこ asks “where,” specifically asking for the notebook’s location. The pattern Xはどこですか asks where X is.
です
At the end of どこですか, です completes the polite question about the notebook’s location. Together with どこ, it gives the polite form “where is it?”.
ジャケット
ジャケット means “jacket” here, the item under which the notebook is found. It appears in the location phrase ジャケットの下.
下
In ジャケットの下に, 下 means “under” or “below,” identifying the area below the jacket. The pattern Xの下に means “under X.”
それ
In それなら, それ refers to the situation just mentioned, namely that the notebook has been found. It does not point to a new physical item here.
なら
In それなら, なら frames the preceding situation as the basis for the conclusion that everything is present. Together, それなら means “if that is the case” or “then.”
全部
In 全部あります, 全部 means “everything” or “all,” referring to all the needed items in the bag. 全部あります is a reusable expression for saying that everything is present.
もう
In もうバッグを閉めていいです, もう means “now” or “at this point.” With 〜ていいです, it indicates that the action is permitted now.
閉めて
閉めて means “close” here and is the て-form of 閉める. It connects closing the bag with the permission expression 閉めていいです.
いい
In 閉めていいです, いい means “okay” or “permitted,” not “good” in a general sense. The pattern 〜ていいです gives permission to do the action.