30:17
STRUCTURE
2363 Views
01:56
READING COMPREHENSION &VOCABULARY
1312 Views
01:52
The Form of Irregular Verbs
1314 Views
01:59
The Tense of the Passive Voice
1394 Views
09:31
Changing from Active into Passive
1169 Views
07:20
The Form of the Passive Voice
1377 Views
03:29
What is the Passive Voice?
1418 Views
03:45
The Form of the Active Voice
1380 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1770 Views
03:20
Since vs For
1519 Views
04:50
Have or Has
1337 Views
00:49
Key Words: Present Perfect
3162 Views
09:03
The Use of the Present Perfect
1330 Views
03:08
Meaning and Form
1370 Views
02:40
Writing Formal Letters
1365 Views
03:10
Language Use
1956 Views
09:35
Parallel Structure
1510 Views
04:35
Prepositions of Instruments and Means
1343 Views
03:27
Polite Requests
1413 Views
06:30
May as a Modal of Permission and Request
1399 Views
04:11
Can as a Modal of Permission and Request
1224 Views
02:50
عناصر الاداء
1353 Views
03:45
شركة ستيرن
913 Views
01:15
مقياس القيمة المضافة
1150 Views
02:58
مقياس الربحية
1115 Views
02:39
معايير دركر
1267 Views
03:51
مقايس الاداء
1281 Views
01:41
اتخاذ اجراءات تصحيحية
984 Views
01:52
المرحلة الثانية من الرقابة
963 Views
02:49
مراحل الرقابة
2276 Views