ダイエットして以来、彼女はずいぶん体重が減った。

だいえっとして以来、彼女はずいぶん体重が減った。

She's lost a lot of weight since she went on a diet.

ダイエットして以来(いらい)、彼女(かのじょ)はずいぶん体重(たいじゅう)が減(へ)った。

Daiettoshite irai, kanojo wa zuibun taijū ga hetta.

ダイエット (ダイエット)

diet; losing weight by any method (e.g. exercise)

以来 (いらい)

since; henceforth

彼女 (かのじょ)

she; her; her; girlfriend; sweetheart

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

随分 (ずいぶん)

very; extremely; surprisingly; considerably; contemptible; reprehensible

体重 (たいじゅう)

body weight; one's weight

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

減る (へる)

to decrease (in size or number); to diminish; to abate

Readings: イ、もっ.て

Meanings: by means of, because, in view of, compared with

Readings: ライ、タイ、く.る、きた.る、きた.す、き.たす、き.たる、き、こ

Meanings: come, due, next, cause, become

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: ジョ、ニョ、ニョウ、おんな、め

Meanings: woman, female

Readings: タイ、テイ、からだ、かたち

Meanings: body, substance, object, reality, counter for images

Readings: ジュウ、チョウ、え、おも.い、おも.り、おも.なう、かさ.ねる、かさ.なる、おも

Meanings: heavy, heap up, pile up, nest of boxes, -fold

Readings: ゲン、へ.る、へ.らす

Meanings: dwindle, decrease, reduce, decline, curtail, get hungry