Doing (something), expresses the state of an action or event that is happening or continuing.私は今、勉強しています。
Noun + は + information + ですN5
<subject> は <information> です. Emphasize the information related to the subject as a noun.この人は先生です。
Noun + からN5
Because of <noun>, đưa ra lý do, nguyên nhân cho một hành động, tình huống. → Because of <noun>, give the reason, cause for an action, situation.病気から、学校を休みました。
Noun + は + noun 2 + より + adjective + ですN5
<noun 1> is more <adjective> than <noun 2>. Expresses a comparative between two objects.この本はあの本よりおもしろいです。
Plain form verb + と + 思いますN5
I think it is <verb>. Expresses the speaker's thoughts or opinions.彼は来ると思います。